Paul was impatient to join the circle... but somebody decided that the circle ended with him. [Rewrite of the original. A more in-depth exploration of the story.]
Twins Andy and Pete were being looked after by their sister Becky while their parents were away. With two bored teens on her hands she should have known better than to challenge them.
I couple married unsatisfactory marrieage and the search for incentives to keep thir marriage working. They explore group sex, swinging, and finally a threesome with a small surprise. There is lesbian sex and the wife's change of mind about her sexuality.