Why She Cheats

An Erotic Story of Cheating and BetrayalNaomi is supposed to be my girlfriend. There's only one problem. She cheats. She cheats all the time. And I know. And I know why. There's nothing I can do about it. She's in control. My ego is so much smaller than hers. All I can do is willingly submit.and hope. This is a 10, 000 word erotic short story that contains explicit sex and sexual descriptions, including cheating partners, anal sex, complicated sexual relationships, group sex, submissive sexual relationships, and other sexually explicit themes and language that not all members of the public will enjoy.
All characters are 18 or older. Excerpt:"Are you leaving?" I asked as she looked around the room. I wanted to have sex and she was already annoyed with me."Not yet.""What do you want to do?""I want to but you're being unreasonable."I didn't think I was being unreasonable. I was just eager and she was teasing me."I'm sorry. Do you want to have sex or not?""You're so romantic, " she said scathingly.
I blamed myself, but I should have blamed her. We've been dating nearly two years. Right away she said it was never going to get serious. From our first date she said she was seeing other people. From the first time we had sex she said we weren't going to be exclusive. From the six month mark she said she was going to see other people and tell me about it. I had never been harder.