Originally Posted by lovecraft68
...or you could go all the way and have the in laws swapping back and forth with the couple including whichever is their actual son/daughter.
I would think the only drawback is it might be hard to categorize.
Yesterday I read a story listed as "new" over in the Lesbian category where a daughter and mother get it on. In the feedback portal, a reader said "please change categories".
I have a feeling that anytime incest happens (and, I do not mean "in-laws" or "step" relations) that will trump any other category no matter how gay
, etc, a story is.
Obviously, there are plenty of non-incestuous ways this could go.
Perhaps the younger couple are swingers, too, and the related
person has no idea that the sex party invitation came from his/her parents. (The in-law does know, hence fitting this story idea into a story.)