My nephew was found to have two gender systems, and my sister-in-law insisted on letting him become a girl. I suggested respecting my nephew's wishes and choosing to be a man. However, he had a difficult time after graduation, and my sister-in-law actually passed the responsibility to me. When I was reborn and returned to the day when my nephew complained that he had a stomachache, I saw clearly the selfishness of my family members and stopped meddling in their own business. After my nephew was diagnosed as intersex, my sister-in-law wanted him to change into a girl. I would never get involved in this family whirlpool again this time, but things turned out beyond expectations.