Who's The Sidepiece?

Bf dumped me. He'd started seeing someone before the breakup, but kept denying it (even after I showed him I had proof). At any rate, she came over one day, and he didn't get anything from her (I kept listening at the door, so, yeah, I know). He was using more porn than usual, and constantly grumpy from her not putting out. I could see his cock trying to climb out of his jeans on a daily basis, and I'm sure it had nothing to do with me hanging out in the living room in skimpy outfits..

I asked him if he knew anyone who'd give me a spanking and then leave without expecting sex. He told me he would take care of it, as he didn't trust anyone else enough.

I let him flip up the skirt of my schoolgirl costume and wail on my ass. He was not gentle; I only lasted a few minutes, and my cheeks were bruised for a few days.

Within a week, I had him pinning me down in his bed, taking out his frustration on my pussy. I loved imagining her catching us at it. I had fantasies of her being tied up and forced to watch, or blindfolded and forced to listen to us fucking. I dreamt of pushing him against the front door, yanking open his fly, and swallowing his cock, knowing she was on her way over, and that she'd be pissed if he didn't try to fuck her. I liked talking dirty to him about me holding her head still while he fucked her face...

We'd always had good sex, but the rivalry took it to the next level. She never did put out, and broke up with him after leading him on for months. I contineud to get some of the best sex of my life, all while helping him through the pain of being dumped. I'm not sure if I was the sidepiece, if she was, or if we were both the other woman at some point. I should feel bad, but I don't. We tried things we'd never tried, and it was like getting to relive the good parts of our years together before finally splitting amicably. (We still love each other, and the sex is hot, but he's ten years younger and needs to sow his oats before settling down with fresher pussy.)

I still think of him when I cum. I really love imagining him fucking another girl while thinking of me. I hope he still gets off to some of my pics now and then.