"Oh, she's gonna be mad." They sound absolutely certain of this. "At least I warned her this time I was going into a fight. Last time. Last time I just disappeared for two days. In the middle of the siege." This time she'll have had two and a half days of not worry and uncertainty, but two and a half days of time to get her rage up that they'd let this happen.

They also sound resigned, quite like they do in fact figure they deserve to be raged at. And it also doesn't really occur to them that she might have worried he wouldn't come back.