This thread caught my attention lurking and so I decided to join to answer.
My Uncle, my Brother, my sister's husband, my husband's brother, my husband's best friend (he was also his best man at our wedding). I've never acted on any but my brother and we have a long history from before I was married.
I was a sex worker from 1988 to 1993 (before I met and married my husband). Those days are long behind me, but I still remember a lot that I fantasize about sometimes.
Why not write a story for lit and publish it. Maybe even a couple of your experiences.