Characters
I can't straddle another ego right now, I'm already doing the splits.
— Dr. Christina Yang
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker says they cannot take on another oversized ego because they are already stretched painfully between others. The splits image is a sardonic way to say they are overloaded managing people's vanity, and adding one more is beyond what they can bear.
Context reviewed