One of my favorites is an ex-fiancé's younger sister. Out of the blue she contacted me a few years after her sister and I split. She said her hot water heater didn't work and asked me to come look at it. I think she remembered I had fixed her parents' hwh while her older sister and I were an item.
I went over to her apartment. The pilot light was out. I relit it. She gave me a tour of her digs. In the bedroom she took off all her clothes, stood by the bed then climbed in. I followed. A hot love affair began.
She and her sister had both been hs cheerleaders. Her older sister was a university cheerleader with the body of a petite gymnast. Her younger sister was taller and fuller with much larger breasts. Both were amazingly flexible in bed.
Younger sister knew I had a big cock. She was the one who walked in while her older sister was riding me in front of the TV set in the family room at 2 am on a hot summer night at their house. Older sister squeezed me so tightly jumping off to hide that I blew my load. Younger sister stood there mouth agape watching my pulsing cock fountain come.
She had always been sweet on me--to the point that her older sister warned me off her more than once.
Our affair was steamy made hotter by its secret taboo nature. It's not the only purely sexual relationship I've had but one of the hottest. She was wild, free and fun. She dated other guys. I dated other girls. Our affair lasted until she began an exclusive relationship.
BTW the selector on her hot water heater had been turned off--something she did to get me to her place.