Taking Another Man's Pussy
It's become a complete fetish with me. I love fucking married women and the ultimate high is taking over another man's pussy. A woman at work made me her "work husband," telling me everything about her life and marriage, and taking 3 or 4 breaks with me every day. She would complain about her husband, including their sex life - the classic problem of a small dick that cums too fast. She's not pretty at all, but has a great body - very athletic and swims every day.
We ended up fucking in my office with the door locked. She didn't tell him at first, but she started introducing cuckolding ideas to him and teased him about his little dick. She found he got turned on by this. It was funny to hear her talk about her husband being a "tiny-dicked loser." She eventually told him about our affair. He cried at first, but then wanted every detail, including whether I made her cum (I do, he doesn't). He ended up getting very aroused by the whole idea.
Now he's required to call me every time he wants to fuck his wife. I let him about one out of three times. The other times I'll either tell him he only gets a hand job, and occasionally tell him to send her to me because I'm going to give her the fucking she deserves.