[Willow squeaks loudly and freezes, staring at him wide-eyed and instinctively terrified to have a blade next to her throat, even if she doesn't really think he'd hurt her. It might be obvious from the careful way she doesn't move that she's not only been threatened before, she's been held hostage before. Now he's really reminding her of Spike.]

I don't know what whitecoat means, [she protests over her heart racing.] Except for 'got lost on your way to a bad prom'. I'm a witch, remember, no stalking necessary. I just did a locator spell.

Can we put the scary thing away now? I was worried about you, that's all.

[It's pretty clear she means that; her expression is still furrowed enough to show her concern, aside from how self-conscious she is.]