Your little sister is laying on her bed rubbing her pussy through her tight yoga pants. You walk in on her as she is rubbing herself. You stand there staring at her and she can see that your cock is getting hard in your shorts. She commands you to whip out your cock so she can see it, since you're just standing there anyway. She is surprised to see how big and juicy you truly are, and she decides that she needs to feel you inside of her. There's only one rule...you have to promise not to tell anyone.