The blacksmith has actually seemed pretty open to believing what she tells him - he never scoffs or shows any other signs of disbelieving at least, although he doesn't ask questions. When it comes to hints about ruthless nature and guilt, he shows no signs of judgement but instead just sets her a task that requires a lot of physical exertion and doesn't leave much room for thinking.

He won't react when she asks about his past, but just before they finish up for the day he'll just say 'Thanks. For not pushing'. And then steal some of her baked goods because that shit's tasty.