What began as a son gently wiping his mother's back gradually evolves into a lewd, intimate relationship. The mother's vulva and son's penis rub together, producing wet, squelching sounds of intercourse. After her son ejaculates all over her face, the mother murmurs, "Getting cum on my face is worse than an internal creampie... this is wrong." When tending to her son who has caught a cold, she wipes his sweat, but his warmth stirs unfamiliar emotions within her. "My boy has grown into a man's body... no, I'm getting wet," she says in a bittersweet tone. Complex emotions and physical desires stir between mother and son, pushing them across new boundaries.