Getting Distracted

Charlie is trying to revise but she is getting very bored, you have asked to borrow a few of her books and when you are on the floor looking through them you notice you can see up her tartan skirt. She is wearing a thong and you can't help but get a hard cock. It doesn't take Charlie long to realise you are perving on her panties and she decides to have some fun with you and your already hard dick instead of revising.