A young man is temporarily home from a Seminary, but eventually falls in love with his father's young new wife.
The stepmother (Edwige Fenech) seduces and cockteases her stepson hard, letting him lick spilled tomato sauce on her arm or wipe a spot of paint on top of her breast, etc. In the second half of the film, they almost kiss in bed but her husband arrives. Finally, just before the credits roll, she has sex with him just before he is about to go back to the seminary, which makes him change his mind and decide to stay instead. I can't blame him.