Ever since the father's infidelity was discovered, Satoko, the mother, had completely lost her spirit. Watching Satoko lose her energy day by day, Katsu decided to protect her in place of his father and poured out his feelings. The two stepped into a forbidden mother-son incestuous relationship. Despite her hesitation, Satoko accepted Katsu and was surprised by his incredible stamina. His penis remained hard even after ejaculating multiple times, filling her with hot semen each time, causing Satoko to gradually forget her husband...
