Sisterly Thing To Do Femdom!

Youre feeling particularly brave and horny today. The shower in your step sisters ensuite is broken, so shes needing to use yours, but you boldly ask if you can watch her shower. What a creepy perverted step brother youre being, but you have no shame and want this opportunity to have some fun with your sweet sister who youve always fancied. You wont leave her be, so she gives up and allows you to touch yourself. Suppose its the sisterly thing to do, right?