Her brother-in-law, who lives nearby, suddenly comes into her house, asking to stay for a few days... That night, she and her husband make love and she makes him feel good with her mouth, but he finishes quickly, and Rikako, unsatisfied, indulges in masturbation in the bathroom with an adult vibrator she had secretly stashed away. Then, she happens to bump into her brother-in-law, who roughly massages her breasts, making them swell...
