Give Meg a chance

Having seen that Gabriella is too stubborn to be your slave, how about you give Meg a try. Her brunet bangs would look amazing dominating that short blonde and her large tits.

You pull Meg out of the test tube and explain to her what you are going to do.

"Ok Meg, I gave Gabriella a chance to be on top of you, but she declined. I am now giving you a chance to dominate her. You will both be punished if you refuse. I want you to strip yourself naked and force Gabriella to suck your pussy dry. You are going to force it into her mouth. Force her to lick you until you orgasm. When you do orgasm, do it all over her face. Then after you orgasm, you are going to piss into her mouth, make sure she drinks all of it. If you do this, you will be rewarded with a better life style as my slave. Got it?"

Meg looks like she is interested in your offer. You did not think she would want to do this as she is a feminist through and through, though it seems you have intrigued her.