Mistress transforms a fancy ponyboy into a working horse using her strap-on cock

Miss Mae Ling, a horse trainer, has a new pony in her stable that she wants to transform from a fancy show pony into a working horse. She knows that the pony's holes will be put to good use, but first she needs to loosen them up. Using her strap-on cock, Miss Mae hollows out the pony's tight ass until it is ready to handle the largest of cocks. Once the pony is broken in, Miss Mae will be able to use it to please everyone's needs.