Find compromise.

"Virginia!" you bark at the viciously wrestling pair, wanting to get the girls attention. They immediately cease their skirmish, frozen in place, Virginia on top of Jennifer, her hands clutching at the blonde student's ample tits, Jennifer beneath her, still clutching a handful of Virginia's red hair. Both turn their heads to face you.

"Yes?" the redhead responds.

"Mouth, or pussy?" you offer.

"What?" she asks back, confused.

"Mouth... or pussy?"

A look of understanding crosses her face. She carefully considers both options.

"Um... mouth, I guess."

"Okay, well let's see if we can't come up with a compromise." You reach down and help both girls to their feet. "By my count, Virginia, you've already had three orgasms. Poor Jennifer has had none. What I propose is that you allow me to fuck Jen... to completion--" a look of disappointment swept across the girl's freckled face. "--but then afterwards, Jennifer will let you suck my cum out of her... won't you Jennifer?" The blonde student only considered my proposal for a moment before nodding her head in the affirmative.

"Does that work for you, Virginia?" You hoped this deal would settle things.

Virginia rolled her eyes dejectedly. "Fiiiine. It's a deal."

"Shake on it, then," you order them.

The two naked girls faced each other and shared a consolatory handshake and an apologetic half smile. The other thirty or so girls in the room continued working out on their machines, paying this scene no mind.