Susumu, her husband's younger brother, stops by while taking care of some business nearby. He and Satomi have known each other since their school days, and seeing him always makes her want to tease him. While all three are chatting, she secretly rubs his crotch with her foot, enjoying the risk of her husband noticing. Susumu tries to escape to the bathroom, but she follows him and wraps her lips around his cock. He gets through that day without being caught and breathes a sigh of relief, but...