This story is part of the Massachusetts Family Love Universe
A disagreement with his sister Natalie over the upcoming Democratic Primary leads to a shockingly sexual bet between her and her twin brother Nathan, which brings on more bets, and things soon escalate between the twins and their significant others, all of whom are kinky enough in their own way and all of them eager to heat things up with each other.
A son finally loses control of himself, and finds in his mother a more than willing partner. She inducts him into manhood, and begins teaching him how to properly please her.
Helen not only pursues her long fantasy of sex with her brother, she also pimps for him sometimes with their mother's three close firiends. Mom makes it a family threesome when outsiders are temporarily excluded.