The Ace is a Private Rubdown
Tanya decides to surprise her son in his dorm with some cookies, but he's not there. His friends convince her to stick around and play a card game while she waits. They make up a lewd game and make the rules as they go along. In the end, Charles convinces Tanya that his ace of hearts means a private massage. Tanya complies with the rules of the game and wouldn't you know it... the massage leads to sex.