An excerpt from Tongue of the Succubus
The sensation was warm and moist—erotic. Marcellus opened his eyes. He looked down and found Regina between his legs, licking his erect penis slowly. Her pink tongue lapped at it from shaft to tip. He lay back and enjoyed the delicious sensation. He looked down again and found her taking his cock deep in her mouth. The pleasure made him tremble and moan. A great orgasm rose inside him that quickened his pulse and made his cock ache.
He looked down again, but this time he found not Regina, but a horrible whore-beast! She was devouring his penis, lapping up his blood, feeding like an animal at a trough!
Marcellus awoke with a shock. His heart was pounding, and he gasped for breath. He was naked with the covers thrown aside. And there was a thick glob of pearly semen on his belly.