My new step-sister, who I got after my parents remarried, wears a mask all the time at home, even when we're eating, except when she's in her room. The mask has become a part of her face. But even though we've become family, my brother can't see his face properly, and he can't help but want to see his real face! So I try to persuade him, but he says the shocking words, "I'd rather take off my mask..." and I'm embarrassed. But I want to see her breasts, so I accept this compromise, and when I see her boobs, I get a massive erection! And then...