I don't need to fend it off. [She can't help but be mildly aggravated at the insinuation, too. All this black magic makes her irritable and prideful.] Trust me, if I needed to fend it off, we wouldn't be having this conversation.

I'm being extra cautious, I promise! I'm way more scared of me losing control than you ever could be. [It's a bold statement to make, but Willow really is terrified of it, and is doing her best at treading the line.] Besides, you don't look like you're doing so hot, either. I see all that wincing.

[Did she just flip from indignant to worried about him without missing a beat? Yup. She sure did.]