So I contact my ex and explain how I think we should forget our no sex agreement. I don't tell her I've already fucked Kelsey. She agrees reluctantly.
Now Kelsey starts getting really into me even though I told her I still love my ex and might get back with her at the end of the semester. She keeps pushing for us to date, I start acting really distant since all I wanted was a fwb thing. We stop hanging out as much and just occasionally text.
I know eventually my roomie will find out, so I went ahead and told him the mystery girl I've been hanging out with for the past month is his ex Kelsey. However, I don't tell him i fucked her. He just thinks i like to smoke weed with her and basically says i better not fuck her, but otherwise he doesn't care if i see her.
He pretty much tells me the reason he didn't date her is because of some secret of hers. I finally get him to tell me what it is and it turns out she is really into doing fucked up things, like cheating on a bf, cutting herself, leading guys on. This makes complete sense because when i first started seeing her she would super horny when we would mess around and my roommate would call me to see what I was doing. There was also this guy she was talking to for 2 months before we started seeing each other. She loved to make plans with him then invite me over, fuck, and read his texts as he kept trying to get in contact with her to go through with their plans. Finally she told him she had been fucking me for the past week, yet still he wanted to be with her. I felt bad for him but he was a pretty big pussy. Also I got the vibe that she didn't give a fuck about her kittens because they kept dying, idk if she did that on purpose or not, but by week 1 of seeing her only 1 was left alive. Still alive to this day though

I also got the vibe that she liked when I would fuck up my school work because we were always fucking. Like when I had a test one night and kept trying to study she just wanted to fuck and did everything she could to keep me from studying.
So although I thought I was over this girl and wanted to go back to my ex, all of a sudden I am super turned on by this chick. I don't know what is wrong with me but the fact that she likes to do fucked up shit is a super fucking big turn on for me.
On top of that I know my roommate would flip if he knew i fucked her. And when I talk with my ex as planned I know she will be PISSED when she finds out I fucked Kelsey. I'm not sure what I should do, but I'm sure everyone can agree I'm a piece of shit. Yet at the same time all of this has been super exhilarating.
I know I should stop talking to her but at the same time this has been a lot of fun.
I'm attaching a pic of this chicks tits that she sent me. I don't care if you host it in a link so gaffers can see.
I really hope Gaf detective doesn't hunt me down, but at the same time I know I deserve it. That's part of the fun
TLDR; Im fucking my roommates ex and he doesn't know. She is fine as hell, but fucked up in the head. Also I plan on getting back with my own ex in a few months and I know she will be pissed that I fucked my roommates ex.