I participated in a wife swapping party held at a friend's house. I became interested in my friend's younger husband, a junior colleague, and started teasing him playfully—surprisingly, he responded positively. While my husband invited the wife to join another man, I took the young husband's penis into my mouth at the party venue and he quickly ejaculated. Later, seeing my friend's wife sucking another man's penis in the bathroom, I again took the young husband's erect penis into my mouth and he immediately got hard once more. In a private room alone together, he revealed a dominant, sadistic side, choking me tightly, which stimulated my masochistic desires and made me involuntarily pee multiple times. When we began having sex, my own husband and my friend walked in to watch, and seeing my husband's reaction, the young husband thrust his penis deeply into me again and again, making me increasingly aroused until I lost control and peed again.