There's absolutely no way he would, or could, ever judge her for something like this. It's not a failing, it's the aftermath of something horrible she'd experienced, and came back from by virtue of mad scientists. How the hell could anyone judge her for reacting? How the hell could he?

His hand stays put on her shoulder. She hasn't shoved him away, and he's staying at her side. Right where he's supposed to be. Even before they'd gotten closer, he was supposed to be at Shepard's side.

"Yeah, I've... I've never seen that before," he admits - as someone who's definitely done those missions before with her. He would have noticed - hell, anyone on the team would have noticed. Again, he doubts anyone would have judged her, thought less of her. "If any of us had, we'd have told you. And then probably Chakwas."

Who also wouldn't have judged beyond her usual why is my crew Like This judgment, anyway.

"Has to be. No other reason I can see." Because he trusts her assessment. If Shepard says this has never happened, then it hasn't happened.