No, you've been this tall the entire time. I haven't done anything to your height! [-Just your brain, apparently.] But I'm not gonna leave, so...

[Reverting the spell doesn't count as leaving him, right? She would rather not leave her new friend now. But maybe if she fixes things and makes friends with him again she could end up with two friends for the price of one, or something like that.

Okay. She's going to do it. Time to fix everything before she's asked anything else about leaving him or making friends. Mary mumbles to herself for a few seconds as she repeats the magic words to herself to make sure she says this right. She wouldn't want to say them wrong and mess things up even more!]

Uh, so... Arbadacarba! [There, that should fix things now...!]