Tony has a new stepsister in Sia Rose, and he can’t help but think she’s hot as hell. It’s not long before Tony realizes that his teen stepsister has an oral fixation that is pretty much out of control. Seriously, Sia loves putting things in her mouth in the most sensual way possible. She also loves when Tony watches her do it. After she has teased Tony with a cupcake and frosting, Sia is all smiles at the idea of relocating to the bedroom and getting a…