My parents remarried and suddenly I had a stepsister. Incredibly pure-looking and unbelievably cute — honestly, I couldn't help wanting to do something about her. My stepsister was extremely shy, easily pushed around, and too timid to ever speak her own mind. So even when I touched her nipples every single day from morning to night, instead of complaining, she eventually started feeling it, drooling and twitching in response... Her nipple sensitivity kept climbing higher and higher, until eventually she started coming to me herself, specifically asking me to touch her nipples. And she has a boyfriend, you know? What an absolute pervert.