My wife's parents live in the apartment right next to ours. My mother-in-law, Aki-san, is so beautiful that my heart still races whenever we eat together. Perhaps that's why I haven't been intimate with my wife lately. She wants a baby and wants to do it, but I just can't seem to get in the mood... Then, my father-in-law got injured at work and was brought home by his younger brother, who works with him. While there, I found some stamina supplements my father-in-law was taking. When I questioned him about it, he revealed that he had been half-forcibly having sex with Aki-san, who seemed to be sexually frustrated.