"I'll comfort you," Aika said, unable to refuse her son's advances. This was her son's kindness, sensing her loneliness. So she accepted it as a mother. That was Aika's conclusion. It was a one-time mistake. With that in Kokoro, she accepted the forbidden relationship, but her son's virility was unquenchable, no matter how many times he ejaculated. "I can't take it anymore..." Aika pleaded with tearful eyes, but her son's thrusts continued endlessly.