Due to stagnant marital life and pent-up desires, Reiko (Sawamura Reiko) ended up having a relationship with her son. If found out, the family would collapse in an instant. This secret must be kept forever… She resolved this, but the moment her husband entered the bath, Reiko felt a burning heat in her groin. Her husband is bathing. Those are 15 minutes of empty time where she can be alone with her son without being found out. Now’s the chance… Looking back, her son was also staring at Reiko with excitement.
