A Change in Relationship

"Hey, how's it going?" Lilith asked in a cheery tone as the trio approached the duo.

"Pretty good, just enjoying the sun!" the girl in the blue t-shirt on the right smiled politely "How about you guys?"

"Oh, yeah, just having some fun in the sun. What about your friend?"

The girl in the grey top remained silent and stared straight ahead as if the witches weren't there.

"You don't talk?" Megan asked her pointedly.

"Not to randoms" the girl in grey replied.

"Don't mind my roommate. She just gets a little cranky sometimes" her friend replied.

"Roommates huh?" Lilith had an idea "Trance!"

The two girls both fell silent. At least one of them had passed the test.

"Grey girl. Whenever you are in your dorm you will be the submissive sexual servant of blue girl here. You will do whatever she says without question and must not wear a single item of clothing once you enter your room. You will be free to act normally during lessons, but at all other times you must remain in your dorm room in case your Mistress needs you. You must never tell anyone about this arrangement"

"Blue girl. Congratulations! You have a new personal naked servant who will do anything you want. Whatever your orientation you will find your servant, grey girl here, physically attractive and capable of satisfying all of your sexual needs. You will find it particularly hot to try out new and unusual ways to **** her to humiliate herself in front of you. When you are outside your dorm you will act like normal and never talk about your sex servant to anyone."

Lilith stopped briefly to consult with the other witches.

"There, that good enough or do you want to add anything else?"