Her response caught him off guard. It was less the words she used and more the open hostility behind them. Had she come here looking for a fight? That didn't make any sense, given how their last interaction had gone, but nothing else made sense, either. She'd shut down almost immediately when she came in, and he couldn't think of what could have set her off like that if she hadn't already been spiraling before she'd flooed in.

"I — the hell's that supposed to mean?" he asked, hugging the floo powder a little closer to him as though he expected her to make a dive for it. It would have been a stretch to say these were plans; he'd just had too much restless energy to sit around without doing anything for much longer, but he was sure the disorganized way he was going about it gave away just how spontaneous the decision had been (the decision to start packing, anyway — the rest wasn't spontaneous at all). He was beginning to suspect, however, that this wasn't really about him, or even about them. It just didn't make sense, for Jo to be this upset this quickly over something this minor. Something else had to be going on, though she obviously didn't want to tell him.

"Don't do what?" he asked, shaking his head. "You stop doing — this," he said, gesturing towards her with one hand while still holding the floo powder with his other. "Whatever this is."