The Shinmura family lives in harmony with their daughter-in-law, husband and father-in-law. However, I was worried that I would not be happy with my children, so I asked my father-in-law for advice. The father-in-law also could not find an answer, but the daughter-in-law, thinking that her husband had many brothers and that her father-in-law's sperm was strong, asked her father-in-law to give her the seed. . At first I intended to do business, but gradually my daughter-in-law started having sex with her father-in-law …