NSPS-438 Immoral! A married woman who can't escape her brother-in-law's dick - Kato Tsubaki Edition

My brother-in-law's wife has become bedridden, and it's too much for him to do it alone, so my husband and I decided to go and help her out once a month. My wife, Minami, is in charge of cleaning and doing the laundry. While my husband is out shopping, my brother-in-law takes the opportunity to come over...