Your sister Stephania is sneaking out and sees that you. Stephania cant have you opening your mouth to mom and dad so she deicdes to make sure you don't see anything. Stephania has caught you looking at her feet multiple times and knows she can humiliate you so she can control you. Stephania slips off her sneakers and put her feet around your cock. Stpehania knows if she makes you cum from her stinky sweaty nylon soles you will be so humiliated and scared she will tell anyone you wont say anything.