My older sister is a young mother breastfeeding in our hometown. (Real-life version by Xiaoxiao Hunan, SONE-201)

I'm a sophomore in college, living a carefree life back in my hometown... However, my older sister (25 years old), who married young and left home, gave birth to her second son. To raise the child, she decided to return home. My sister, always outgoing, would openly expose her breasts in front of me, or chase after her eldest son in the bathroom wearing only underwear. After two pregnancies, her body became even more voluptuous, and my sexual desire was almost out of control. One night, while drinking with my sister, I got drunk and, in my intoxication, suggested that she drink my semen!? Of course, the two of us crossed the line; their relationship went beyond simply breastfeeding…