Sister Finds Out That Her Nipples Are Sensitive And Plays With Them While Laughing At Her Nipples.

A flat-chested little sister and a big-breasted older sister. One day, the little sister discovers that her sister has extremely sensitive nipples. She bursts into her sister's room while she's secretly masturbating her nipples, and rubs, licks, and sucks! With her little sister's tongue technique, the older sister is quickly made to cum and her nipples become weak! From then on, the little sister targets her sister's nipples at every opportunity! Laughing while toying with her sister's nipples, developing them day after day! The older sister becomes so sensitive that even a little stimulation makes her areolas orgasm, but in the end, she turns the tables on her little sister's nipples...