Bored siblings, Michelle and her stepbrother, find themselves alone and horny. Michelle retreats to the bathroom, masturbating with abandon. Caught in the act, they argue, but later, they confess their mutual attraction. Naked, they explore each other's bodies, Michelle marveling at her stepbrother's massive cock. Just as they're about to consummate their taboo desire, an unexpected intrusion forces them to halt their intimate encounter.