He shuts up about it then thank Merlin, but he finds other things to apologise for – for taking so long to return, for not thinking of leaving her food and water, for not being able to get her out yet – and saying how glad he is that she's still alive. How worried he was when he couldn't come back down sooner. How scared he was that she'd be discovered. She looks up at Malfoy at one point as she chews, and sees him staring at her with something rather like horrified concern in his eyes at the state she's in, and buckets of guilt too, and she wonders how it is that he's changed so much.