ok, I am not happy it happened but it did and I am sure why I let it happen.
I was at a party with my bf and I went off to the bathroom and when I came back I see him flirting with another woman, then I see his hand on her tits as she leans in to kiss him, a quick peck but there was some tongue.
So I go outside to vent, I was mad cause we have been together just over 3 years with no ring. I am so stupid. So outside I am walking when I notice this guy watching me from the shadows, turns out its Jimmy, my bf's best friend. He asks me whats wrong and I kinda tell him about inside and the other girl and then vent about being with someone for 3 years...blah blah. Anyhow he steps closer and hugs me. He tells me Paul is a real creep and has been getting worse even with his friends. I am like crying but not water falls and then I feel his lips on mine. My hands went around his neck as we continued and then I feel his hard cock against my body and he is grinding it against me. Then his hands slowly start lifting my skirt over my hips and I am unbuckling his belt.....out in the garden he sits down on some cold concrete bench with me stradling him and we fuck. I dont know if it was the act of the cheat or his larger cock then Paul, it was nice, or the threat of being caught in the garden but it was so good. So we finish and we go inside and Paul is doing stupid shit with another woman.....so I tell him I feel sick and am going home. Jimmy is standing there and he mentions to Paul that he is bored and was leaving to so he could drive me home and Paul says whatever.  I was once again pissed....to pissed. After 3 years he more or less just dumps me right in front of everyone at this party. So we leave and on the way to my place we talk about what happened in the garden. Jimmy confesses he has had a crush on me for quite awhile and has always wanted to be with me. That he had watched me and Paul fuck a few times at Pauls house through the bedroom window on the first floor. That was creepy and as we drive his hand finds my thigh and he is starting to finger me and I am not stopping it, I am thinking of all the things I was doing to Paul while Jimmy was watching. I am getting drenched as he touches me and i think of him watching. At my apartment I invite him in to finish what we started in the car and this time I really let my slut come out. We were at it all night long. That morning paul calls to apologise and I tell him that we are done and that I was with Jimmy. He didnt believe me so I woke Jimmy up and put him on the phone and then proceeded to suck his big cock as he talked. Now Jimmy and I are a couple and we enjoy engaging in public sex. I really get a thrill when someone notices us and Jimmy gets the rewards. Anyway, was I wrong for leving Paul, am I bad for doing the public sex stuff? Is Jimmy using me to just have sex. We dont live together, we just fuck an aweful lot.