CKE18 - Tight T-Back

What are balance balls good for besides exercise? Uta shows us in these fun and wild photos but can you figure it out? If you thought the t-back thong was the key then you'd be right! With every sexy rotating wiggle on the ball, Uta's thong gets stuck tighter and tighter between her tight little booty cheeks. It's going to take the whole crew to pull this thing out when she's done. Care to help?