The younger brother discovered her nipples... She was mocked and roughly rubbed them, and after multiple nipple orgasms, the sensitive older sister was internally ejaculated on. (Lingzhijia Ling HMN-919)

When my sister and I were at home, my hand accidentally touched her nipple. I felt terrible! But in an instant, she reacted strongly, trembling and becoming incredibly wet and incontinent. Huh!? It was just a slight touch, sister, are your nipples very sensitive??? Because of the incredibly sensitive and interesting reaction of her nipples, I touched, pinched, and pulled them… After painstakingly stimulating her sensitive nipples to increase their sensitivity, she began to crave a penis and let me ejaculate inside her!!