>Weekend Airbnb with GF, her friend, and her husband
>Lots of drinking and soft drugs.
>The husband passes out, his wife takes him to bed.
>I'm a night owl, but gf makes us go to bed too.
>30 minutes later she's out cold and I'm still wired, so I get up and go down to the finished basement to drink some more beers.
>Her friend is down there alone, now in PJs, having wine and watching TV.
>"You can't sleep? Me either."
>Have more drinks, joking and laughing alot.
>She starts being very giggly
>Motions like she's going to whisper something to me.
>I lean in, she grabs my face and kisses me.
>Shocked, but she's more attractive then my GF, and I'm drunk, so I kiss back.
>She straddles me, I'm kissing her neck and she's lightly grinding against my erection.
>I reach to unbutton her top and she stops me and stands up saying "Wait wait"
>*Oh fuck I pushed it too far*
>To my surprise she just starts slipping out of her PJs. Nothing underneath.
>I undress and she climbs back into my lap, whispers "We have to be quiet" and slides onto me raw.
>We make out with me inside of her, she's rocking her hips
>She wraps her arms around me and buries her head into my shoulder and starts riding me.
>Nervously listening to her moans and the couch squeak, convinced we were going to get caught.
>She starts shuddering like she's cumming
>She says "It's okay for you to cum" which sets me off
>She hops off, gives me one last kiss, then grabs her clothes and runs upstairs.
>I wash my crotch off in the basement bathroom sink, flip the cushion over, and sneak back into bed like what the fuck happened.
>Next morning get her alone in the kitchen for a second. "So, uh, how are you feeling?"
>"Oh, I'm so hungover but I'm alright. How are you?"
>"Oh, yeah, I'm so hung over, but I'm good too"
>Rest of the weekend avoid being alone with her out of embarrassment. She acts completely normal
>Later that year find out she's pregnant, freak out until I do the due date math
>Never cheated before or since