Mistress T is in charge of organizing the library. She is trying to clean the shelves and re-organize the books but she simply can't reach them. She summons her slave and uses him to lift her up so she can easily reach everything. She makes him hold her up for a long time and feeling his neck between her thighs makes her excited. She decides to make the ride even more fun and she makes him do deep knee bends with her mounted on his shoulders. She makes him give her a great ride... up and down... up and down... until he finally collapses with exhaustion. Lucky pony!