Daisuke and his wife have been married for a while, but she seems uninterested in sex. Her parents, eager for a grandchild, suggest a hot spring trip to rekindle their spark. To ensure success, Yu makes Daisuke abstain for a month—no sex, no masturbation! On the trip, pent-up Daisuke is at his limit. In their room, he tries to fuck his wife, but she refuses. Disappointed, he heads to the bath but mistakenly enters the women’s section, stunned by Yu’s naked body. Losing control, he almost ravishes her but stops himself. That night, his wife allows sex, but Daisuke’s mind is consumed by Yu’s beauty. Rejecting his wife, he returns to the women’s bath, fucking his gorgeous mother-in-law, unloading a month’s worth of cum deep in her womb! Though resistant, Yu succumbs to his hard, thick cock, gradually taking the lead, lying to her family to fuck her son-in-law freely. Later, while his wife remains childless, Yu is pregnant, shocking her husband and daughter...