Your little sister is so excited to see you. She is wearing a cute baby doll dress and stockings. It looks like she isn't wearing any panties. You try not to look. You shouldn't...but its hard not to. But she knows you've been watching her and now she wants to play. She teases you at first by quickly spreading her legs on the couch. Now you know for sure-she isn't wearing panties under that dress! Again, you try not to...but you can't help it. You have to see more. Your little sister is excited to get what she wants. She continues teasing you, showing off her pussy. She has never shown anyone and loves feeling like a naughty girl. She suggest that you play with your cock while she plays with her pussy. She is so excited to play with you. " This is so so wrong...but it feels really good!" You enjoy watching each other and soon you both can take it anymore. " Lets cum at the same time. I'll count to ten..." Now that you are both satisfied, she lets you go back to studying. But you have to promise her that you can play again soon! It'll be your little secret