One night and two days of 1 night and left alone by my wife's sister who suddenly came over

Every time Akio hears a report from his wife, who is returning to her hometown to give birth, she is delighted with the joy of becoming a father soon. However, despite his desire to have his wife in perfect condition, the house is littered... At that moment, my wife's sister, Chinatsu, came to check on her. Though she thought it was pathetic, she left everything to Chinatsu, but Akio only noticed Chinatsu's breasts and butt as she was doing housework, she looked at her. "It's the worst thing I can see with that kind of eyes my sister-in-law who came to visit me because I was worried about him." That's when I was thinking about this...