Description
The man was on a train with his wife and her sister. The man couldn't help but get an erection when Kokoro felt the touch of his wife's sister's body during their accidental close contact on the crowded train. The sister noticed this and started to have a mischievous Kokoro, touching her brother-in-law's body without arousing her sister. Then she gradually became aroused and reached for his penis without her sister noticing.