Strange is moving as he talks, trying to get a different view of this magical-technological mishmash inside Yukio's brain while also separating himself from the rest of the group should they need to bumrush Yukio.

"Oh, I'm certain she's stalling," Strange chimes in. "After all, it's not like this embarrassment can do anything without her toys."

And he is perfectly fine with a little bit more of that stalling, mostly because he wants to examine whatever the hell the Mother's doing to Yukio while the magic's active.