Give in

Silently, I climbed onto the bed and got on my hands and knees. I was a bad girlfriend, but right now I needed to get fucked more than I needed to stay faithful. Jack hopped up behind me, giving my ass a light slap as he rubbed his tip up and down my slit. I was wet and ready to go now, my pussy dripping viscuous juices all over my sheets as I was filled up with cock. Jack started out slow, agonizingly at times. He lubed one finger and slipped it into my asshole, much to my surprise; I had never done anal of any sort, but I enjoyed the feeling of humiliation from it more than anything. Jack let loose before too long, his cock almost hitting my womb time and again until he released himself inside of me, rapidly rubbing my clit as he did to make me orgasm as well. I had taken load after load into my womb during the past few days; if I was even slightly fertile, I would almost certainly get pregnant from this. I imagined getting knocked up from cheating with a stranger and found the thought strangely enticing.

Jack withdrew, casually putting his clothes back on while I lay in a heap on my bed. It was a little bit before I was up again, finding him sitting in my desk chair tapping away on his phone. I got up and pulled on a new pair of panties and a sports bra, and now faced Jack.

"I wrote down my phone number here," he pointed to a piece of paper, "Text me next time you want to fuck. Or just hang out, I guess."

I nodded, opening the door for him and letting him out. I took a quick shower, hopping out and looking at myself in the mirror again. I normally wasn't very positive about my body, but all of this attention and sex had made me see myself as hot. I was not just hot, I was smoking hot. I put on the lingerie again, and found myself admiring my body as an example of beauty. I still felt bad about what I did, but I couldn't help but recall how good I had felt. There was still emotional attachment to Thomas, but he had never once made me feel as good as any of the other guys had. I knew Thomas would never accept what I had done, but I only had to make sure he never found out. Then, in theory, I could have the best of both worlds; good sex and a relationship with the man I loved.

Addicted now to men craving my body, I snapped a quick picture of myself in the mirror wearing the lingerie and sent it to Jack. I paused before sending it to Kevin; that one would need some thought. Speaking of Kevin, we still hadn't decided where to meet to work on the project. If we went to Kevin's apartment, sex was all but a guarantee. If we went to the library, I could still go back to his place and have sex. Of course, if he didn't come to the library then it wasn't going to happen.