Your step-sister caught you stealing her dirty panties from the laundry basket! Wow, so it has been you the entire time? No wonder she has no panties to wear! Why are you doing this? You can't stop smelling her dirty asshole and jerking off your cock? Wow she didn't know that her step-brother is such a terminal pervert? But since you love the smell of her ass so much, why not get it directly from the source? She will let you smell her butthole and give you detailed jerk off instructions and in exchange you will pay for everything and do all the house chores! Now that she realized that her ass has so much power over you, you have no choice but do anything she wants you to! Are you ready to stroke? ;)