You are shopping for your girlfriend’s birthday dress with her sister but you are struggling to decide what to buy, Charlie thinks that if she tries the dress on you might speed up because you will be able to imagine what it looks like on her sister. She strips off in the middle of the store and you get an instant boner when she removes her panties to slip in to the very sexy dress, Charlie notices the bulge in your trousers and can’t believe her sisters boyfriend is getting a hard cock over seeing her shaven pussy.