A little background on the story. I have a friend that I've known since gradeschool. We're both in our mid twenties, home owners, and have steady careers. He has a live in girlfriend who he has been dating around almost six years now. About two years ago, I guess she started flirting with me, we're both usually drunk when this events happen. She would flirt with me and I suppose I would flirt back. I thought nothing of it. Two years ago at a party I happen to get a bloody nose out of random. She wisks me away to a private bathroom where she is nursing me. Next thing I know she starts going for my belt buckle. I tell her NO straight up and stop her. I don't tell her boyfriend.
A year or so ago another key moment. Another party at my friend in questions house. A bunch of people present. Her and I are both drunk. Sometime during the party we find ourselves outside between the garage and the door. She starts putting my hands on her body and she starts kissing me. I'm telling her that her boyfriend is my bestfriend. She says she doesn't car. My hands are still on her from my own will. She starts going for my buckle and I point her towards the garage. She grabs me by the buckle and leads me to the garage. We enter only to find mutual friends in the garage. That doesn't stop her. She still is placing my hands over her breasts while her hand is down my pants. I manage to stop it. Tell these mutual friends that she is drunk and is nothing to worry about. They remain silent.
Three weeks ago another get together that involves drinking. After a night of drinking I sleep over a friend in questions place. Both the girlfriend and my friend go to their bedroom and I'm on the couch. I wake up to her voice. She is standing in the kitchen walkway with her back to me sliding down her pjs and underware. I make my way to her and I'm all over her. I'm on my knees, I'm kissing her, I'm getting her turned on anyway I can. We make our way to the couch where she gets on top of me and we have sex. Her boyfriend of six years and my childhood friend is mere feet away from us sleeping. During the middle of our sexual conquest, I kinda sing a tune of "I'm messing with my bestfriends girlfriend" and she laughs. We finish, kiss for a bit, and she goes to lay next to her boyfriend.
I wake up the next morning, realize what I did, but feel nothing. I make my way home and I am actually there later hanging out. Messy situation I know. Her and I don't even speak about what we have done when sober, but get a few drinks in us and we're all over each other.