The one with the Sharp Emerald script

You flick through the pages until you get to the chapter with the Sharp Emerald script. Eager to cast a spell before Tina changes her mind, you start to read the first few pages out loud:

"Emulas, Falalto, Varam, Issive!"

As soon as the last syllable leaves your lips, Tina's eyes go wide, and she kneels down in front of you, and lowers her gaze to the floor.

"What are you doing Tina?" you ask your friend.

"I'm kneeling before you Mistress."

"Oh very funny!" you say scowling at her. "Get up!"

Tina gets up while you look back into the book, preparing for another spell. Finding another one you look up, but before you vocalise the spell, you notice that Tina is still looking at the floor, and hasn't moved.

"What are you doing?"

"Nothing Mistress"

"Why do you keep calling me that?" you say, starting to get annoyed at your friend for making fun of you.

"Because you are my Mistress, Mistress."

"Stop taking the piss Tina! Why don't you just go and fuck yourself!"

With that, Tina reaches her hands to her jeans, undoes the top button, and slips her hands inside. You open you mouth in shock as you watch your friend playing with herself inside her clothes. You realise that your friend wasn't joking - she really does believe that you are her Mistress, and will do anything you say.

"I can't watch you properly through your clothes Tina. Take your Jeans and panties off!" you command. Still not fully believing it, you watch as your friend removes the clothes from the lower half of her body, then proceds to masterbate furiously in front of you. You've seen your friend naked before, but never this way, and you've never seen another woman masterbate before.