She just ends up squeezing him a bit, something like a hug, pressing her head into his chest cavity to show support. She worries. God does she worry. But... it's gonna be okay. This is all temporary... or something. She doesn't know how to quite describe it, but this all seems too surreal, too much, a little too far from plausible--

But Mettaton's security starts arriving, and it's gone. The police start arriving, and it's gone. She hands him over for treatment, and it's... gone. She's back to worrying over him and fretting over the world and it's out of her mind.

It's gonna be okay, then. It's over. She'll just have to hold onto that.