My wife is due to give birth next week. However, in these times, it is difficult to give birth at home, so my wife and I decided to stay at my sister-in-law's house, who lives nearby. My sister-in-law is kind and beautiful, and it seems too good for my brother. ...She seemed happy. But the reality was different. No matter how long she waited, she was unable to have children, so she had my brother get tested, and it was discovered that he had azoospermia. Seeing my sister-in-law in such despair, I couldn't help but become aroused...