His Stepmother's Massive Secret: A Taboo, Futa-on-male story (His Massive Revelations Book 2)

Since discovering the massive secret between her legs, Tom has become his stepsister Amanda's willing and obedient plaything. But when a particularly cruel game leaves him trussed up on her bed, his hot stepmother catches him covered in the evidence of their forbidden lusts.

But as he confesses to their naughty games, it becomes clear that his stepmom shares both Amanda's secret and many of her tastes. And when he can't resist her soft, warm comfort, he finds himself sliding even deeper into a confusing world of taboo lusts.