the sister of the girlfriend i met for the first time was an introverted and shy beautiful girl. i felt interest and sexual desire for her sister, who was the complete opposite of her girlfriend, who was outgoing and experienced, and innocent and didn't know men. and i couldn't help but touch her unexplored nipples... at first, her sister resisted the sudden nipple torment, but she had her first orgasm after her nipples were persistently kneaded. i made her grow into a sensitive, premature ejaculation type with just a little stimulation and had a lot of nipple sex!