My wife used to go visit our daughters at college a couple of times a month. It took me a while to discover what they got up to together. I didn't like them doing it on my dime, so I gave them the freedom to do what they liked in the future. A flash BTB story, no sex.
After posing for her painter friend Nils, Lisa notices a pair of statuettes on his fireplace mantel, and she is reminded of something that happened years ago. She is inspired to a sort of reenactment. Illustration.
Mark had to go visit his step-daughter, Hannah, at college. He got a late start and had to stay over night, expecting to sleep on the couch. While lounging he has to adjust himself multiple times and Hannah wants to know why.
A short story with no revenge or hatred of the other spouse. Just a quicky about two parents that saw the writing on the wall and thought of their kids rather than themselves...