YSN-393 I tried to make my overprotective sister wear erotic underwear and get her to hate me, but she put it on without complaint. Moreover, she was squirming with excitement in that situation. Seeing her like that, I also got excited carelessly, and whe

Since I was little, my sister has been overly protective of me like I'm her own son. She strongly dislikes it when I try to get a girlfriend or watch erotic books and AVs. When I couldn't hold back my sexual desires anymore and bought some extremely H underwear for my sister to wear, she reluctantly put it on but was too embarrassed. It was so erotic that I involuntarily got an erection. My sister noticed the bulge in my crotch and stared at it drooling, so I jokingly said, 'Want to lick it?' She suddenly took my dick all the way down her throat, so I let her do as she pleased.