You are feeling horny and decide to risk looking through your Sister's underwear whilst she is out of the house. You eventually find what you're looking for but just at that moment she storms into the room, catching what you are doing. She is initially very upset before she realises that you have got your penis out and it's the tiniest, most pathetic willy she has ever seen in her life. It's not worth being mad over so instead she spends the rest of the time making sure you know what a tiny, pathetic creep you are. She makes you do humilating tasks until she is happy that you know your place. She threatens to expose how small your penis is to everyone if you don't do what she says.