A sister who works manual labor and sweats every day, a tomboy through and through. But in reality, she has extremely sensitive nipples! If you touch them even a little, she immediately turns into a woman! My sister, who has no feminine qualities at all, is walking around without a bra in a tank top, so her nipples are sticking out, and I can't help but stare. Her erect nipples bother me so much that I can't hold back and touch them, and suddenly my sister's crotch is soaked and she's having an explosive orgasm! She abruptly becomes feminine, making a slutty face and craving a cock! Normally, my rough-around-the-edges sister wouldn't get hard at all, but today she's rock hard!
