My wife's mother-in-law, Marina, has come to Tokyo from her parents' home to support her as her due date approaches. Thanks to this, family relations are good... or so I thought, but she has ordered me to not masturbate for the time being, as she cannot tolerate me getting pleasure on my own. A few days later, while I was hiding in the bathroom and masturbating, Marina slammed open the door. I was shocked by this sudden turn of events, but Marina, who knew the situation, apologetically asked me if I wanted to help her, and made an unexpected suggestion...