Im your big step-sister, and mums left me in charge of you while she's out shopping. UHG! you've made a mess in your nappy haven't you! That's disgusting! I hate changing your dirty stinky nappy! It makes me feel sick, and I'm dressed nice waiting for mum to come back so that I can go out with my friends. I'll make you a deal, I'll flash my knickers off for you and let you jerk off looking at me, but you have to wait for mum to come home to change your nappy. When mum comes home wait for 5 minutes and then tell her your nappy is full, so that I don't have to change it, Ok?