Haven't you learned that with having a step-sister like me, it's not good to get on my bad side! Just look at you now, all tied up and strapped down to your bed not able to move or get away. Now I am really going to make you pay for annoying me all day long, and sense Step-Mom and Step-Dad aren't hear to hear you cry there is no stopping me now. I think getting you nice and hard and not letting you cum is a good way to start to pay you back for all those annoying times of dealing with a step-brother like you.