Mihi was caught masturbating. Her son-in-law says, "Mother-in-law, you're unsatisfied, aren't you?" and embraces her. "Let go," she refuses, but once he thrusts his huge cock inside, Mihi loses control and cums repeatedly. "Don't tell our daughter about this," she pleads, but she becomes completely addicted to her son-in-law's massive cock, unlike her husband's.