Did I do something to deserve being cheated on?

It's a real story. The details are much more involved and kind of embarrassing. Since I was basically just lonely and ended up being stupid about the whole thing. I shouldn't have let myself get involved. Longer but condensed version of the story: Me and a roommate move into an apartment next door to a girl and her mom. Girl stops by and says Hi, starts hanging out. One day hanging out, end up play wrestling with the girl, she jumps on me and stradles me; she lifts up her shirt and puts her DDs in my face (no bra) and offers to have sex with me. I decline because I had just found out a couple days before that she was (way) under 18. Although she did have a 21yr old bf who slept in her bed with her in the same room as her mom. (No idea why). Anyway ended up getting to know her mom better. Ended up going out to drink with her one night, she made the moves on me, I went with it. So I fucked her mom. Girl was furious with me, whatever. Mom decided to marry a guy from her past in NY, she invited me along for the summer, I went. So did aforementioned 21yr old bf. We got a cheap apartment there for the summer. I was forced to listen to them fuck in the next room all summer, hated it. Girl and her BF broke up that fall, she was crying a bunch, I comforted her...things happened. But I moved back home because she was too young and I didn't want to deal with the drama. Fast forward a couple years, we start talking online. She says she loves me, gets me to come back for the summer. I come back, get extra room in the House. 2 weeks later she is back with a recent ex and I'm left listening to them fuck all summer. Plus she and her mom are coke addicts by this time. Too much drama, I work the summer till I have money to leave and I get out.

WOW That could be turned into a movie or something. That would suck if I were in your position. I think I have just realized that I'm starting to develop NTR fetish :)))

NTR? = http://www.urbandictionary.com/define.php?term=NTR

I have plenty of real life stories.

...I'm guilty of being an NTR Villain with half of the relationships I've had. But it was only that easy because the men were either abusive or ignored their woman's needs. I mean seriously. When your girlfriend that's a 9/10 asks you to take her and her equally attractive friend to the bar you DO NOT blow them off to play videogames with the guys. That's when they call guys like me.