Maria lives with her daughter and son-in-law, continuing to share a household even after her daughter's marriage. One day, while cleaning their room, she discovers her son-in-law masturbating while reading a porn magazine. The sight excites Maria so much that she rushes back to the living room and begins masturbating herself, eventually falling asleep. While she sleeps, her son-in-law sneaks into her room and fondles her breasts, teasing her nipples. When Maria wakes up and sees him, he apologizes, but she pulls him close and says, "Men have desires—it's only natural." From that moment on, the two begin secretly indulging in forbidden encounters behind her daughter's back...