Instruct my young stepsister in the art of riding, concealed in my private chamber

In my room, I stumbled upon my stepsister\'s secret stash of naughty videos. I couldn\'t resist teaching her how to ride like a slut. With her petite frame and big, bouncy ass, she was ready to learn. As my mom walked in, we quickly hid the evidence, but not before she caught a glimpse of our forbidden lesson.