A leash.

Charlotte was beaming, keen to show off her purchases and eager to please, like, well, like a puppy.

Vanessa looked in the bag and pulled out the butt-plug tail as expected, together with a tennis ball, a six foot leather leash and a studded collar.

"Good girl", said Randy, and Charlotte smiled even more widely.

Here, he tossed her the ball and she caught it without question.

"No, puppies carry balls in their mouth. Keep the ball in your mouth at all times unless you're eating".

Charlotte's eyes widened in understanding, then she opened her mouth as wide as she could, then wider still and tried to stuff the ball into it. It was too big.

"Don't worry, you can find a smaller ball later, but get the biggest one you can fit in your mouth".

Charlotte nodded enthusiastically, "Woof".

"Now take your clothes off and lets get this leash on you so we can take you for a walk",