This is an intro post, the first of many adventures with my ex’s sister. If you don’t care about details and only want the slutty bits, skip about halfway down the post.

Once upon a time, I (M22) got married to a woman “Debbie” (F21) while I was young and dumb. We were together for two years when Debbie told me her younger half-sister “Betty” (F18) got into some trouble back home and needed to come stay with us for the summer. I agreed, and we made arrangements for her to sleep in one of our guest rooms. I had never met Betty or even seen her before she showed up at my house, so I was pleasantly surprised when she showed up.

Betty was 5’2” with a tiny frame, a nice ass, and breasts way too big for her little body. She would walk around in loose shorts and tshirts, but there was no hiding that perfection. Despite being super attracted to her, I had morals and could never cheat on her sister, especially not with her own blood. Everything was on the up and up in person…but my morals only extended so far.

When I would go to bed at night, I would think about her while I laid in bed with Debbie. Don’t get me wrong, Debbie was beautiful and sexy, but there was something mysterious about her sister. She acted innocent and helpless so I would do things for her. (Back then I thought she was just naive, but I’ve since learned it was on purpose - more about this in another story).

I was a pervert and would try to peek up her shorts when she would sit cross legged on the couch…check out her ass as she would walk by…try to sneak glances down her shirt when she was bent over doing something. There were many nights when I would fall asleep after cumming to mental images of her soft creamy thighs. I would imagine what she was doing in her bedroom, just two doors down…was she touching herself? Did she have a vibrator she brought with her? Sometimes, I would fuck Debbie thinking about what it would be like to be with Betty. Maybe she heard us? Does she like it? This went on for a couple months, but the summer was short, and she had to go back home for college, never to be seen again...until:

Fast forward ten years, I’m divorced from Debbie and remarried to someone else. We go out for drinks one night, and guess who is bartending? Little sister. We exchange pleasantries and catch up a little. She still looks amazing, and has definitely grown into her womanhood. Shes much curvier than last time I saw her, but that’s a great thing for me, I love curvy women. I introduce my wife to her, and it turns out Betty is the manager of the bar. Wife is a seasoned bartender and ends up getting a job there, and now I have a reason to see Betty some more.

About a year later I somehow end up with her disappearing posts app (edited for automod). Shes playing coy and shy at first, but I can tell she’s interested. We end up exchanging some pics and vids while sexting, and masturbate together over video one day…and then she ghosts me.

Over the next 4 years, we see each other at the bar occasionally. My wife and I are in an open marriage, but it turns out Betty has a long term boyfriend, a much older man who doesn’t like to go out. One night in fall 2023, I’m lucky enough to run into Betty outside of work at another bar while I’m by myself. She’s very drunk and dancing with one of her girlfriends. She sees me at the bar drinking a beer and sits next to me and spills her guts about how her husband (boyfriend from before) isn’t attracted to her anymore and they don’t have sex. I have no idea where her friend went, but I don’t really care either. In my head I’m just thinking that I want to fuck her like she needs to be fucked at this point. I’m picturing bending her over one of the bar stools…fucking her on a pool table…fucking her in the bathroom…anywhere to be inside her. But that doesn’t happen. Instead, we stay there until closing time chatting.

We go our separate ways, but I message her on social media about how I’ve always been into her and how attracted I am to her, and for the sake of the story, I don’t remember all the things we talked about that night, honestly. But, about an hour later we ended up meeting each other to go walking in the neighborhood (we lived about 4 blocks from each other it turns out) At some point, I stopped her, tilted her head back, and kissed her, because she told me I was scared. I had to prove her wrong. We kept walking, but as the flirting picked up, I would randomly stop to stroke her pussy through her leggings to be a tease. I grabbed her ass and pulled her into me, pressing my hard dick against her as I kissed her to get her flustered…it worked. We eventually made it back to our own houses and kept texting til 6 in the morning.

We texted and talked daily all week and made plans to meet up the following Saturday. We took my big pickup and parked out in the country in a hidden spot she knew about and made out for a while. I was very nervous because she was aggressive and dominant, and I wasn’t used to that. I consider myself a pleasure dom, and I like to be gentle and tease and make her beg…she was having none of that. She tried to take what she wanted from me.

She was very conscious about her body because of her husband, but I was doing my best to take her mind off it. Kissing her all over, touching her all over, telling her how beautiful she was…We peeled off layer after layer of clothes until she was in her bra and panties in my front seat and we were making out still. I was teasing her clit and driving her crazy, and she ordered me to get in the back, then climbed over the armrest. I did as I was told, but my dick was not cooperating because I was so nervous. Instead, I kept playing with her pussy and kissing her all over as she came for me time and time again. She was extremely tight, even before she came - I could barely slide two fingers inside of her. She was ordering me to fuck her, and I kept telling her no, pushing her onto her back and fingering her until she came several times.

Finally my dick started working a little. I rubbed the tip up and down her wet little pussy until it was hard enough to push inside, and she came after just a few strokes. Im average when it comes to my dick size, but it hits her spot at just the right length, and it made for some mind blowing sex for both of us…but not this time for me. I went soft again. Time for plan B. Betty had told me how she doesn’t like to receive oral, she would rather just have sex because oral doesn’t do anything for her. I was determined to change her mind that night.

I pushed her knees back to her chest and pushed my tongue inside her pussy, then flattened it and ran it all the way up to her clit. I’ll never forget what came out of her mouth…”oh! Oh my god!?”…as if questioning what she just experienced. When I eat pussy, I circle her clit with my tongue, and then suck it while slowly flicking it with my tongue at the same time. I lick and kiss all over her pussy so her clit doesn’t get too sensitive all at once, and then I repeat until it’s building and building to an orgasm. And she really loves it. “Oh fuck” she repeated over and over, in a panic, as she grabbed my hair and pulled my face into her while she ground her pussy all over my mouth. She fucked my face as she came for the very first time from oral. I was the king of the fucking world…but I didn’t stop.

I slid two fingers inside her and kept going. I stopped sucking her clit, and used my tongue to flick it while I worked my fingers inside her. She let go of my hair and pushed off the truck door to fuck my fingers as they explored her tight little hole. She came a couple more times like that, and then I sucked her clit again as she was coming down from an orgasm, and it pushed her over the edge completely. She stopped breathing and her body clenched up. I forced her legs back open and wouldn’t let her stop cumming. She gasped for air, making little noises in between breaths. Her pussy clenched my fingers so tight I couldn’t move them anymore, and when she could breathe again she started crying and laughing at the same time. I slowly slid my fingers out and held her in my backseat, kissing her and brushing her hair with my fingers. (Aftercare is important ladies and gentlemen)

When she finally came down, she told me she wanted me inside her, and she wanted me to cum. She wanted to suck me until I was hard, but I wouldn’t let her - tonight was about her. I did end up getting hard again, and we did have sex, but this part of the story doesn’t have a happy ending - I just couldn’t cum, and I gave up after trying a few times. Our sex did jump start a very passionate relationship, with her promising to make it up to me the next time we got together. And she definitely did.

Our relationship has been filled with lots of great stories and memories of sex and everyday adventures. You’re not here for the vanilla stuff though, so we’ll stick to the things you’re going to touch yourself to from now on. Now that you guys have the back story and how it all got started, I’ll post another of our adventures soon, and maybe I’ll ask her to post as well under her account. You’ll know it’s us, because we are ‘Best Fucking Friends’.

If you’re reading this, and your wife started staying out all night last fall, I suggest you pin her down by her throat and fuck her hard. That’s what she wants from you, but you’re not giving it to her, so I do. I don’t want to take her from you, after all, I can’t take what’s already mine. I don’t feel bad for fucking your wife, in fact I think you should thank me for saving your marriage. She’s happier than she’s been in years. You just need to accept that you’re not fulfilling her sexually, and I’ll do that for you from now on.