On a night when her husband was away on a business trip, Yuriko was alone, pleasuring her own body. Her desire grew increasingly intense, pulled into a whirlpool of excitement. That passion soon reached the next room, drifting toward her sleeping son. She gently kissed him, forgetting she was his mother, losing all sense of self as she lovingly licked his penis. Then, mounting him, she rubbed her wet slit against him, merging their bodies as one. But this act eventually awakened her son from his sleep...