Make her bisexual of course.

"Good, sleepy nurse." you say and she the expression drops from her face.

"Can you hear me?" you ask. "Yesss... massster..." she moans dreamily.

"Good, when you wake up you will be completely bisexual. You will be attracted to men and women equally. You will be attracted to me above all others. You will find yourself especially attracted to Cyndi and Dr. Reese."

"Yesss... master..." she drones.

"Now I want you to repeat what I just said back to me." you command.

"I will be attracted to men and women equally."

"And Cyndi and Dr. Reese?" you ask.

"Yes, master. They are attractive too. And I will find them attractive."

You nod and smile. "That's a good girl, very good."

At those words she shudders. You notice your glistening slit and your dick is rock hard.

"I want you to climb on top of me and ride me while you repeat your instructions."

"Yes master" she says, and robotically climbs onto your cock.

"Good girl, ride me until I cum." you command.

You thrust into her slowly and she picks up the pace. She moves robotically, eyes staring dreamily into yours.

"Yes master, I am equally attracted to men and women. Yes master I am attracted to you above all else." she repeats in time with her hips. "Yes master I have a special attraction to Dr. Reese."

"Yes master, I am equally attracted to men and women. Yes master I am attracted to you above all else.Yes master I have a special attraction to Dr. Reese." she drones, now with breath more ragid.

"That's a good girl, very good. Increase your pace." Her thrusts become harder and faster as you near orgasm. "Yes master, I am equally attracted to men and women. "

"I'm going to cum! Cum with me!" you gasp.

"Yes master, I am equally attracted to men and women. I am going to cum. " she repeats, expressionless and breathing geavy. You grab her waist and weakly try to pull her down hard on to you as you explode inside of her. Her eyes roll back into her head, mouth open wide, and her back arches. Your penis twitches inside her.

"I am attracted to you above all else. I am especially attracted to Dr. Reese." she drones on through heavy breaths.

"Good girl. That was a good girl. Now when I say awake, you will awaken remembering all of my commands and everything I did to you while you were in trance." you say.

"Awake!" She collapses onto you, your limp penis still inside her.

"Holy shit" she says, gasping for breath.

"That was incredible." We lie there, her on top of me, both of us breathing through heavy breaths, for a long time.

When she has finally recovered, she asks "why Dr. Reese?" You flash her a devilish smile.