Because Fonzie didn’t know what Starslip looked like under her mask.

"Because you don’t even know what I look like under my ma—" Starslip started to point out before freezing completely, realizing what she’d said was stupid for two reasons: Because that wasn’t quite what Alfonso had meant, and because of what the mobster was now beginning to realize.

The Bewitching Mob Boss blinked in surprise, looking down on her nemesis. It had clearly never occurred to her beforehand that at no point during either of their encounters had the mask been taken off. Fonzie had seen the blonde completely naked and exposed, save for her face. But then, that was probably because, once the mask was gone, that would be the end of all secrets and aliases between them.

Ohhh crap, Starslip thought, sweating. Now I’ve REALLY done it. There’s no way she’ll pass it up now. And if she takes my mask off, then that’s it. My secret identity is blown. Even if she never tells anyone else, my worst nemesis EVER would know who I really am.