Dad whispered a joke in my ear, and Mom laughed so hard that she fell back. At this moment, my numb legs loosened, and my penis scurried out like a venomous snake, and happened to be pressed under her buttocks. It was terrible! Mom obviously felt it, and curiously reached out to touch it, and suddenly realized that it was my penis, and she retracted her hand. Mom's laughter stopped abruptly, and she was about to jump up in embarrassment.
This is part of the Libertine series. (2) Part of the Massachusetts Family Love universe
This is a spin-off from the Hank serial, which begins to describe life for Reginald, Sally's narrow-minded ex, who is turned into a sex slave and gigolo for Sally's half-sister Candy and Candy's half-brother/beau Lewis.
Mattie and Matthew initiate the most taboo of incestuous relationships: Mattie is Matthew's mom. He has no idea how complex the relationship really is, though, until the morning after.