Yuka cherished her only son, Kenta, deeply. When her husband was transferred to a distant city for work, she devoted herself to taking care of their son. Trying to ease her loneliness, she poured her affection into him—only to realize too late that her feelings had shifted from maternal to romantic. What began as emotional dependency soon turned into a physical relationship. Even after her husband returned home and the family resumed living together, their twisted bond persisted. Now, every time her husband reaches for the doorknob at the front entrance, hot arousal surges from deep within Yuka’s body.