It Was Inevitable, Thank God It Happened

Long story short...I was alone in London and was invited to a dinner party at my nieces. She and her husband are in the fashion business.
There were two gay couples, a srt8 couple, them, me and a guy named Robert. I am married but have always wanted sex with a guy.
We shared a cab...with him to be dropped off at his apartment, and me at my hotel.
I didn't get to my hotel.
We both wanted it...we were subtle at first and then he massaged my erection in the back of the cab.
Once is his apartment we cut loose. We kissed, made out, sucked and he fucked my virgin ass.
We crashed and then, in the morning it was my turn to fuck him.
We had 36 hours of totally heavy and wonderful sex.