Watching other couples through a telescope leads a mother and her son to each other's arm as well as pave the way for a three way relationship with a girl they used to watch.
Thinking she is at home alone for the day, a mother fantasizing while she does some work in the kitchen attacts an unknown stranger to initiate an erotic encouter she never imagined.
To help her divorced mother pay bills, a young teen lets herself be photographed in sexual positions for money by the next door neighbor. She enjoys sex and posing with him so much that she eventually brings her girlfriend, brother and mother in on the fun.
You should read Punished by the In Laws first. Jason comes home to his pretty wife. He is very horny and Katie takes care of him. They go over his parents house for Sunday dinner and Katie's punishment continues with her husband watching.
A short story that I hope provides you with a chuckle or two. Mom and Dad are worried about their son Jeff as he heads off to college. His high school dating record was dismal. Mom and Dad hoped that would improve during his college years. (Sex is referenced with little or no detail.)
Mom stayed over for a couple of days in my apartment. There she used my exercise equipment, wearing a very sexy outfit. While she teased the hell out of me, I discovered she was open about sex more than I ever dared to imagine.