One day, while cleaning the bathroom, I slipped and fell into the bathtub. As I hurriedly tried to get up, my son Atsushi came to help me. My clothes were completely soaked, making my blouse see-through and revealing my breasts. Staring intently at me, Atsushi suddenly began assaulting me. Using my husband's business trip as an excuse, we spiraled into a forbidden incestuous relationship.