You have always had a naughty spot for your step sister and you notice she has forgotten to lock the door as she has a shower. You see Louise fully naked in the shower! Instead of being a decent stepbrother, you stand there and perv on her! Louise notices what you're doing and can't believe it! She will make you a deal though, if you get your COCK out and WANK it for her, you will promise to leave her alone and not perv on her again. Deal?