The new girl, of course

The dark-skinned Indian took another step forward and said "Let me get that for you" as she reached for my unmistakably engorged penis. With one fluid motion, she undid my pants and pulled them down, letting my cock burst forth from its confines. She made appreciative noises and slid her palm down its length, sending tingles up the rest of my body.

"Thank you for picking such a good first patient, Dr. O'Neil." Lakshmi said, purring as she continued to stroke my cock.

"He really was such a delightful surprise. It'd be a shame not to share it." Sarah said as she eased up behind me, wrapping her arms around my waist and pressing her breasts into my back.

I let them banter back and forth for a bit, trying to decide how to best make use of the situation I found myself in.