Ten days

Many days pass before the two even interact with Valk of their own volition, Maud got to watch some rock documentaries and Pinkie played some videogames due to it

At the tenth day both mares approached Valk, Maud was the first to speak "we accept your proposal" then Pinkie interjected "but the promises will be Pinkie promises" Valk nods and the three made the promises, officially making Pinkie and Maud obedient fuckpets.

"Here are the rules of being my fuckpet" Valk says grabbing the attention of both mares "you only get to have orgasms on two situations, first situation is when I tell you you can orgasm, the second is a bit different for either of you, Maud can cum inside of Pinkie's pussy at anytime and Pinkie can cum inside of Maud's pussy anytime".

Both sisters look surprised at the second situation.