sexstories.com
Top Rated Sex Stories
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Joe chapter 9 by Krejik
Rated 95.5%, Read 36531 times, Posted Mon 5th of January 2015
Fiction , Blowjob, Cum Swallowing, Oral Sex, Teen Male/Teen Females, Threesome, Young -
-~In the Basement~- chapter 2(finished) by Thatguy120
Rated 95.5%, Read 47724 times, Posted Tue 9th of June 2015
Fiction , Anal, First Time, Oral Sex, Teen Male / Teen Male -
Jenny and Pam Girls Night Out by Jenny-from-NJ
«This night had a theme and a mission. I recently confessed to Pam about my cock craving obsessions and explained that I often seek out random guys for a quick, no strings attached blow and go. Pam excitedly wanted to join me to lend a hand; I mean a mouth.»
Rated 95.5%, Read 18219 times, Posted Fri 24th of April 2020
True Story -
The Chauffeur (#19) Diane and a Baby by PABLO DIABLO
«The sexual orgy continues...»
Rated 95.5%, Read 68490 times, Posted Sat 26th of January 2019
Fiction , Anal, Bi-sexual, Blowjob, Consensual Sex, Cum Swallowing, Domination/submission, Group Sex, Job/Place-of-work, Male / Females, Oral Sex, Pregnant, Threesome -
Lori's Adventures 1 by sinner10
Rated 95.5%, Read 21717 times, Posted Thu 14th of January 2010
True Story , Oral Sex -
Running through the bases by Alexnstuff
Rated 95.5%, Read 22743 times, Posted Sun 29th of April 2012
True Story -
Billy Bob Chapter 5 (Helping a Psychologist) by one olde mann
Rated 95.5%, Read 18915 times, Posted Sat 8th of January 2011
Fiction , Male / Female Teens, Oral Sex, Young -
Diary of Billy Bob Chapter 7 (Mutual Therapy) by one olde mann
Rated 95.5%, Read 21465 times, Posted Sat 8th of January 2011
Fiction , Group Sex, Oral Sex, Young -
Alice Chapter Two by The Third Marker
Rated 95.5%, Read 28329 times, Posted Fri 11th of February 2011
Fantasm , Drug, Male/Teen Female, Masturbation, Toys, Voyeurism, Young -
Finding Love Along the Tracks Chapter 10 - Moving On by Railfan1984
Rated 95.5%, Read 13359 times, Posted Thu 3rd of April 2014
Fiction , Blowjob, Consensual Sex, Cum Swallowing, Erotica, Oral Sex, Romance, Teen, Teen Male/Teen Female -
My Motel Fantasy - A break in the action and after by Pogo123
Rated 95.5%, Read 54882 times, Posted Thu 16th of January 2014
Fantasy , Consensual Sex, Males / Female, Oral Sex -
How I met Shari by FirmHose
«A true tale of my first time with Sharon»
Rated 95.5%, Read 24993 times, Posted Wed 17th of November 2021
True Story -
College Bathroom by pdosu
«First time gay in a college bathroom»
Rated 95.5%, Read 231381 times, Posted Mon 4th of June 2018
Fiction , Anal, Cum Swallowing, Gay, Oral Sex -
Julie 3 - Cheerleader sleepover by Red Czar
«My neighbor Julie has a sleepover party with her cheerleader friends»
Rated 95.5%, Read 317733 times, Posted Wed 5th of April 2017
True Story , Blowjob, Consensual Sex, First Time, Male/Female, Teen, Teen Male/Teen Female, Teen Male/Teen Females, Virginity, Young -
Rob's Girls 2 by Impax
Rated 95.4%, Read 86907 times, Posted Wed 15th of June 2011
Fantasy , Male / Females, Virginity -
Fucking a MILF! by jafobuds
«Miriam was an older woman, I was a 22 year old guy and she wanted my cock!»
Rated 95.4%, Read 244374 times, Posted Wed 21st of June 2017
True Story , Cheating, Consensual Sex, First Time, Male / Older Female, Oral Sex -
Terror in the Snowstorm – Final Capter by wantsomefun
Rated 95.4%, Read 98154 times, Posted Sun 8th of February 2009
Fantasm , Consensual Sex, Oral Sex, Romance, Teen Male/Teen Female -
A Girl Named Hope Ch 01 by Scott Free
«Robert works selling computers until he meets Hope, a college student, who needs help with her laptop. He helps her, and Hope is VERY grateful.»
Rated 95.4%, Read 73233 times, Posted Mon 8th of February 2021
Fiction , Blowjob, Cheating, Consensual Sex, Job/Place-of-work, Male/Female, Oral Sex -
Linda 2 by gwcozzier2
Rated 95.4%, Read 60960 times, Posted Fri 9th of July 2010
True Story -
Stepson Matt...One Hot Summer (Reprint/Update) by SexGirl012
Rated 95.4%, Read 167175 times, Posted Wed 9th of January 2013
Fantasy , Male / Older Female -
The Harem Pt.5 by theman256
«The harem house needs a little IT support»
Rated 95.4%, Read 86370 times, Posted Sun 30th of June 2019
Fiction , Blowjob, Cheating, Consensual Sex, Group Sex, Job/Place-of-work, Male Domination, Mind Control, Threesome -
What a Deal! Chapter 6 by Deadeye_76
Rated 95.4%, Read 64995 times, Posted Sun 26th of August 2012
Fiction , Anal, Blowjob, Domination/submission, Female/Female -
Shit On My Porch by fbailey
Rated 95.4%, Read 42738 times, Posted Sun 17th of January 2010
Fiction , Consensual Sex, Male/Female -
Joe's Story by randyoldman
Rated 95.4%, Read 55239 times, Posted Fri 19th of September 2014
Fiction , Blowjob, Cum Swallowing, Female/Female, Male / Female Teens, Mind Control -
My Weekend With Dawn - Sunday Morning by Sofa_King227
«Dawn and meet up for a 3 day weekend. We have tons of hot sex and a serendipitous threesome that is just amazing!»
Rated 95.4%, Read 39828 times, Posted Wed 27th of October 2021
Fantasy , Blowjob, Cheating, Consensual Sex, Cum Swallowing, Erotica, Female solo, Hardcore, Male/Female -
After School Duties: Episode One by stifflittlepoints
«Matt, Tyler’s older brother, catches her looking out of her bedroom window watching 3 guys run around the backyard naked. He blackmails her into providing daily services for the quartet.»
Rated 95.4%, Read 253731 times, Posted Thu 6th of December 2018
Fantasy , Authoritarian, Cum Swallowing, Exhibitionism, First Time, Oral Sex, Young -
Opposites Can Attract by somethin fishy
«A socialist lesbian finds love in the most unexpected place.»
Rated 95.4%, Read 38844 times, Posted Fri 4th of June 2021
Fiction , Coercion, Consensual Sex, Lesbian, Male/Teen Female, Romance -
Andy and Me - First Time by *****
«Hormones take over myself and my best friend as we are sexually active with each other. Our first sexual activities in life.»
Rated 95.4%, Read 107868 times, Posted Tue 13th of February 2018
True Story , Blowjob, Cum Swallowing, First Time, Gay, Teen -
Homeschooling With Jillian - Part One by Lucent33
Rated 95.4%, Read 630960 times, Posted Tue 3rd of April 2012
Fiction , Exhibitionism, Male / Female Teens, Male / Older Female, Oral Sex, School, Young -
The Ticket VI by Wolfen1
Rated 95.4%, Read 78045 times, Posted Thu 5th of December 2013
Fiction , Consensual Sex, Male / Females, Male / Older Female -
Perchance To Dream Pt. 3 by Mojavejoe420
«Mel and Jim try to reach an accord»
Rated 95.4%, Read 101505 times, Posted Thu 22nd of December 2016
Fiction , Domination/submission, Female / Girl, Hardcore, Older Male / Female, Romance -
Broken Birds, Part 16, Jennifer by Deneb
Rated 95.4%, Read 33855 times, Posted Tue 23rd of October 2012
Fiction , Bi-sexual, Group Sex, Male / Females, Oral Sex -
Learning I am bi by Jim2066
«College roommate helps me learn my sexuality»
Rated 95.4%, Read 285672 times, Posted Fri 16th of July 2021
True Story , Anal, Bi-sexual, Boy / Boy, Cum Swallowing, Gay, Teen Male / Teen Male, Virginity -
Blowing Rusty by BigJ69
Rated 95.4%, Read 233475 times, Posted Sun 22nd of August 2010
True Story , Cum Swallowing, Gay -
PROFESSOR PUTNAM Pt.1 by smokycat67
«The arrogant and self-entitled Professor Stacey Putnam is put firmly in her place when a student 25+ years her junior finds something that could jeopardize her career at a crucial time, should it get out.»
Rated 95.4%, Read 124560 times, Posted Tue 13th of April 2021
Fiction , Anal, Blackmail, Blowjob, Coercion, Male/Female, School -
Protective husband four loves part four by Hard93
Rated 95.4%, Read 86652 times, Posted Thu 12th of April 2012
Fiction , Bi-sexual, Consensual Sex, Group Sex, Male / Female Teens, Male/Female, Pregnant, Romance -
Tiny House 1 by T. Foxal
«Josh, a 36 year old man, divorced many years now, is asked to build this incredible looking 52 year old woman a Tiny House. House building was never this much fun»
Rated 95.4%, Read 46101 times, Posted Tue 3rd of April 2018
Fiction , Male / Females -
Life Redone (Part 5 of 10) by TripleAcesHigh
«The Life Redone Series continues»
Rated 95.4%, Read 48453 times, Posted Sun 2nd of March 2014
Fantasy , Blowjob, Consensual Sex, Cum Swallowing, Erotica, Hardcore, Male/Female, Oral Sex, School -
Two curious friends by DirtyGBoy
Rated 95.4%, Read 325605 times, Posted Thu 21st of November 2013
True Story , Anal, Blowjob, Boy / Boy, First Time, Gay -
ABBY & THE CEO 8: THE STAFF MEETING by Ike Man
«A young woman seeks a job in a large office where nudity among women is the norm and public sex is a stress-reliever.»
Rated 95.4%, Read 83577 times, Posted Fri 15th of January 2021
Fiction , Anal, Consensual Sex, Female exhibitionist, Group Sex, Job/Place-of-work, Males / Female, Oral Sex -
First Chapter 2 by maryme
«Jill finds more was to explore her new found love of sex.»
Rated 95.4%, Read 42132 times, Posted Sat 3rd of August 2019
Fiction , Blowjob, Male/Teen Female, Oral Sex, Threesome -
My part-time job by canemont
«It was the holidays and we had bills to pay. My husband was out of the country for work and I thought I would surprise him by paying off some of those bills. It was an interesting job.»
Rated 95.4%, Read 17361 times, Posted Mon 7th of July 2025
Fantasy , Ass to mouth, Bi-sexual, Blowjob, Consensual Sex, Female/Female, Job/Place-of-work, Threesome -
Marnie and I explore sex together by jafobuds
«Marnie and I experince 1st time sex together»
Rated 95.4%, Read 76890 times, Posted Fri 28th of April 2017
True Story , First Time, Virginity -
Dragons of Arma - Part 6_(0) by Fatesknight
«Heath and his bird - Heath's Past»
Rated 95.4%, Read 21087 times, Posted Wed 13th of January 2016
Fantasm , Cheating, Non-Erotic, Threesome -
Promotion by Impax
Rated 95.4%, Read 37401 times, Posted Thu 26th of February 2015
Fiction -
True Confessions of a Real Slave Part 2 by myroobear76
Rated 95.4%, Read 82275 times, Posted Sun 11th of November 2012
True Story , Domination/submission -
The Walk...continued (pt2) by charlotte69
Rated 95.4%, Read 38445 times, Posted Wed 8th of January 2014
Fantasy , Bi-sexual, Cum Swallowing, Romance, Transgendered, Transvestite -
A beautiful wish Ch. 4 by Joe Brolly2
Rated 95.4%, Read 24087 times, Posted Wed 18th of July 2012
Fiction -
He Did it in My Mouth (2) by brynnboi
«A boy must betray his best friend, a girl named Taylor, by engaging in sex acts with her grandfather.»
Rated 95.4%, Read 158319 times, Posted Thu 26th of October 2017
Fiction , Bi-sexual, Blowjob, Boy, Cum Swallowing, Mature, Reluctance, School, Young -
The Neighborhood Gang by jugjuggler69
«Life long friends start to get adventurous with each other»
Rated 95.4%, Read 225153 times, Posted Mon 31st of August 2020
True Story , Blowjob, Boys/Teen Female, Exhibitionism, Female solo, Group Sex, Male / Female Teens, Teen Male/Teen Females, Threesome -
A Threesome adventure! by Jillthegiantslayer69
«Joyce ventures out of her comfort zone and tries something new with two lucky guys!»
Rated 95.4%, Read 58245 times, Posted Thu 23rd of September 2021
Fiction , Anal, Blowjob, Consensual Sex, Group Sex, Hardcore, Males / Female -
NONE RICHER THAN I--Part 2 by senorlongo
«The sequel to "The Third Richest Man in the World."»
Rated 95.4%, Read 30546 times, Posted Mon 2nd of May 2016
Fiction , Consensual Sex, Oral Sex, Pregnant, Romance -
Eternal Darkness: Chapter Seven by OnceForgotten
«Whats more scary than the General Roku reborn? Well...nothing once he gets angry»
Rated 95.4%, Read 29955 times, Posted Mon 21st of March 2016
Fantasm -
Sam from the Gym by Preezin
«I somehow get a chance with the incredibly hot girl from the gym.»
Rated 95.4%, Read 138492 times, Posted Thu 24th of July 2025
Fiction , Teen, Teen Male/Teen Female -
A visit to the doctor by rockhardabs
Rated 95.4%, Read 346563 times, Posted Sun 24th of February 2013
Fantasy , Anal, Blowjob, Domination/submission, Gay, Job/Place-of-work, Mature, Oral Sex, Young -
Pandemic Roommates by Mr. Butts
«Two horny young men weary of the ongoing isolation of the Covid-19 lock down discover new ways of sexual pleasure.»
Rated 95.4%, Read 203217 times, Posted Tue 30th of June 2020
Fiction , Anal, Bi-sexual, Boy / Boy, Erotica, First Time, Gay, massage, Teen Male / Teen Male -
SOLD!!! – Pt. 10 by smokycat67
«I sell myself to save the business - and the business i get into!»
Rated 95.4%, Read 52614 times, Posted Fri 26th of February 2021
Fiction , Blackmail, Blowjob, Male / Older Female, Oral Sex, Prostitution -
Too Perfect to Pass Up [Chapter One] by justexposed
Rated 95.4%, Read 195147 times, Posted Mon 25th of June 2012
Fiction , Cheating, Male/Teen Female -
Falling In Love With Kyle- Chapter 2 by babyallthroughthenight
Rated 95.4%, Read 34704 times, Posted Thu 17th of January 2013
Fiction , Romance, Teen Male/Teen Female, Written by women -
The Girls Next Door – 11 by oldman6976
Rated 95.4%, Read 90816 times, Posted Sat 7th of July 2012
Fantasy , Anal, Female exhibitionist, Group Sex, Male / Female Teens -
The Nerd - 5 by senorlongo
Rated 95.4%, Read 63675 times, Posted Wed 11th of May 2011
Fiction , Anal, Blowjob, First Time, Threesome -
Aimee Round Two by Stark1965
«Aimee comes back for another massage»
Rated 95.4%, Read 51144 times, Posted Sat 29th of September 2018
True Story -
luck and Love: VI by StoryFox
Rated 95.4%, Read 34443 times, Posted Sun 12th of May 2013
Fiction , Non-Erotic -
My Boyfriend's Father II by makoma
«A teenage girl goes on a trip with her boyfriend’s family and comes back changed»
Rated 95.4%, Read 594081 times, Posted Sun 4th of April 2021
Fiction , Authoritarian, Blowjob, Cheating, Consensual Sex, Domination/submission, Hardcore, Male/Teen Female, Older Male / Female, Oral Sex, Spanking, Written by women -
Safe Word 2 by slyde503
Rated 95.4%, Read 63120 times, Posted Thu 13th of August 2009
Fiction , Anal, Ass to mouth, Blowjob, Consensual Sex, Exhibitionism, Male / Older Female, Male/Female, Mature, Older Female / Males, Oral Sex, Plumper -
Trapped part 2 by Daddy's Gurl
Rated 95.4%, Read 50946 times, Posted Sun 9th of January 2011
Fiction , Consensual Sex, Romance, Written by women -
Dark as Ivory 1 by Payne_Hall
«A thrill seeker meets an edge playing sadist online and decides she wants to try his kind of games.»
Rated 95.4%, Read 257898 times, Posted Fri 27th of November 2020
Fiction , BDSM, Fisting, Humiliation, Male Domination, Reluctance, Romance, Spanking, Voyeurism, Water Sports/Pissing -
The Wrath of Gaia by AthoughtfulJ
Rated 95.4%, Read 21828 times, Posted Tue 30th of September 2014
Fantasy , Male/Female, Non-Erotic -
Good Neighbors Part 2 by dirtydavid
Rated 95.4%, Read 28419 times, Posted Wed 28th of March 2012
Fantasy -
The House Wife by catcat1070
Rated 95.4%, Read 28716 times, Posted Tue 21st of July 2015
Fantasm , Lesbian -
Kate & Jim Chapter 3 by beagle9690
Rated 95.4%, Read 11742 times, Posted Sat 27th of June 2015
Fiction -
THE GIRL GUIDE by lesley_tara
Rated 95.4%, Read 246537 times, Posted Wed 24th of June 2009
Fiction , Female / Girl, First Time, Lesbian, Teen, Threesome, Virginity -
it happened on vacation (and continued at home) pt 13 by str8tohell
Rated 95.4%, Read 160218 times, Posted Wed 10th of August 2011
Fiction , Pregnant -
Sunny by Anhaga001
«Youth Pastor Gary believes that God created young women to help men not give into the temptation of intercourse outside of marriage. He convinces Sunny, a young woman in his congregation, that God intended her to receive a man's lust in such a way as to save him from that temptation.»
Rated 95.4%, Read 188934 times, Posted Wed 24th of March 2021
Fiction , Blowjob, First Time, Male/Teen Female, Young -
My sister-Part two, the next day by quigley
«After the sex yesterday with my sister, I wasn't sure what to expect today»
Rated 95.4%, Read 107628 times, Posted Tue 12th of March 2019
True Story -
Friend's Mom Accidentally Exposed by chance52
«My best friend's mom was always the object of my fantasies. One day, I finally got to live them out.»
Rated 95.4%, Read 256278 times, Posted Tue 17th of August 2021
Fantasy , Consensual Sex, Latina, Male / Older Female, Male/Female, Oral Sex, Teen Male / Female -
Marty, The Golden Boy_(1) by dallasalice1140
Rated 95.4%, Read 144069 times, Posted Tue 26th of January 2010
True Story , Anal, Blowjob, Boy / Boy, Consensual Sex, Cum Swallowing, First Time, Gay, Young -
Kelly Ripa Wants To Be On Top by Inishfree
Rated 95.4%, Read 498030 times, Posted Sat 9th of March 2013
Fiction , Anal, Blackmail, Blowjob, Coercion, Consensual Sex, Cum Swallowing, Drug, Fan fiction, Group Sex, Male/Female, Oral Sex -
Lost Empire 79 by pars001
«A man with a past, not tied to anyone makes a startling discovery that changes his life and his perceptions of it.»
Rated 95.4%, Read 16836 times, Posted Thu 29th of July 2021
Science-Fiction , Alien, Non-Erotic -
Second Chance At The Beach With Kate by markerss
«I wasn’t expecting to see her again, and I didn’t recognize her at first but there she was. It surprised me because she was even more beautiful than before, more grown up.»
Rated 95.4%, Read 74808 times, Posted Tue 22nd of June 2021
True Story , Blowjob, Consensual Sex, Male/Female, Male/Teen Female, Mature, Older Male / Female, Oral Sex, Teen, Young -
All for Mr. Redman Chapter 3 by JadeM
Rated 95.4%, Read 113676 times, Posted Fri 27th of May 2011
True Story , Anal, Asian, Blowjob, Consensual Sex, Cum Swallowing, Hardcore, Male/Female, Romance -
My new lover - my brother by maddie345
Rated 95.4%, Read 41202 times, Posted Tue 27th of September 2011
Fantasy -
House Slut 8 by phenylalanine
«Tegan spends the morning with Sam and Angus, exploring some new limits and trying to figure out what she wants.»
Rated 95.4%, Read 86532 times, Posted Mon 17th of September 2018
Fantasy , Humiliation, Reluctance, Water Sports/Pissing -
First Time Sex Stories #5: Sneaky Little Squirt by Missy Younglove
Rated 95.4%, Read 398523 times, Posted Sat 31st of July 2010
True Story , Boy, First Time, Teen Female/Boy, Young -
Twins, Ch 2 by Impax
Rated 95.4%, Read 85974 times, Posted Tue 12th of April 2011
Fiction -
TAKEN BY SURPRISE by lesley_tara
Rated 95.4%, Read 164739 times, Posted Sun 12th of June 2011
Fiction , Female/Female, Job/Place-of-work, Lesbian -
The Bradford Family Saga Part 10 by jgepowers
Rated 95.4%, Read 19203 times, Posted Fri 26th of April 2013
Fiction -
Yes, Detective: Chapter 3_(2) by rcandy123
«Dana and Abby fight their way to take down the Morgan Family business. But afterwards Dana pushes the detective away while on trial and during jail. Can they make up afterwards?»
Rated 95.4%, Read 23694 times, Posted Fri 9th of December 2016
Fiction , Death, Erotica, Female/Female, Lesbian -
Courting A Vampire 7 by kristof2050
Rated 95.4%, Read 19668 times, Posted Sun 11th of March 2012
Fantasy , Non-Erotic -
Quid Pro Quo 1 by Larten21
«A university student needing help with his essay walks in on one of his housemates in a compromising position, instead of freaking out she agrees to help him if he helps her first»
Rated 95.4%, Read 100923 times, Posted Wed 29th of September 2021
Fantasy , Authoritarian, Consensual Sex, Erotica, Masturbation, Romance -
Kaylene_(1) by Big Red One
Rated 95.4%, Read 192654 times, Posted Thu 8th of March 2012
True Story , Group Sex, Male / Older Female -
SUPER MILF (the whole story) by carrdon121
Rated 95.4%, Read 270636 times, Posted Sun 17th of February 2013
Fiction -
Bible Belt Bride Chapter 2_(4) by doll1
«A young girl from a repressed background marries an indifferent husband and soon begins a swinging lifestyle.»
Rated 95.4%, Read 84198 times, Posted Fri 20th of September 2019
Fiction -
Covid Gloryhole Ch1 by M.underwood
«A girl desperate for money in lockdown makes some desperate decisions»
Rated 95.4%, Read 392019 times, Posted Tue 16th of February 2021
Diary , Blowjob, Cum Swallowing, Job/Place-of-work, Oral Sex, Teen, Young -
The National Academic Championship by AR_ES76
«While reluctant to be in this situation, it ended up to be my first time.»
Rated 95.4%, Read 117969 times, Posted Fri 26th of June 2020
True Story , Blowjob, Consensual Sex, Cum Swallowing, First Time, Oral Sex, School, Teen, Teen Male/Teen Females, Virginity, Young -
Alicia Saves Her Mother's Job by Rutger5
Rated 95.4%, Read 383388 times, Posted Mon 14th of November 2011
Fiction , Blowjob, Consensual Sex, Cum Swallowing, Job/Place-of-work, Male / Older Female, Male/Teen Female, Older Male / Female, Teen -
Science Can Be Fun by DM827
«Two students conduct a sexual experiment»
Rated 95.4%, Read 322353 times, Posted Thu 23rd of August 2012
Fiction , Anal, Boy / Boy, Cum Swallowing, Oral Sex, School, Teen Male / Teen Male, Young -
Sinnndy Goes To A Bachelor Party by sinnndy
«My boyfriend Billy is throwing a Bachelor party for his friend and invites me to go along. It's ends up being a wild night for me. There were a couple of firsts for me, including being with women for the first time.»
Rated 95.4%, Read 51732 times, Posted Tue 18th of August 2020
True Story , Exhibitionism, Female/Female, First Time, Group Sex -
Amy's Fantasy by BashfulScribe
«Amy might pride herself on being a tease, but even teases have their breaking point.»
Rated 95.4%, Read 1383750 times, Posted Sun 24th of June 2018
Fiction , Blowjob, Consensual Sex, Cum Swallowing, Domination/submission, Erotica, Exhibitionism, Female exhibitionist, Group Sex, Male/Female, Males / Female, Oral Sex, Voyeurism -
Sexcapades with Cindy, Ch. 1 by pdosu
«Partners begin exploring their sexual fantasies.»
Rated 95.4%, Read 24966 times, Posted Mon 22nd of January 2018
Fiction , Anal, Consensual Sex, Oral Sex