42M4F- My ex-girlfriend's lesbian sex servant

I dated a woman shortly after I graduated from college. It was one of those fun relationships where both parties knew the deal. We had a blast together, had great sex and hung out with a cool group of people but we each traveled for work so we kept it casual. The relationship just kind of faded in the end, no big fireworks or break up, it just faded.

About a year later I ran into her at a party. We were both pretty drunk and spent the night together. We were talking in bed the next morning and the conversation turned to what we had and hadn't shared with each other when we dated. I didn't have many good secrets, but she dropped a bombshell that still turns me on any time I think about it.

She was roommates with a sorority sister who was engaged to be married. They had known each other for years but after college things changed. In their apartment, the sorority sister effectively served as my ex's sex servant, pleasing my ex in any way she chose.

I love to tell the story of how it began and all the things that she shared with me. Let me know if you'd like to hear the details.