Given that Valdis wasn't one to offer thanks, his surprise should have been expected, but it could be that he still wasn't used to having people who actually cared enough to offer thanks. If she could admit it to herself, they both had been desperate for it, even if they both feared it. She smiled slyly at his question. If he couldn't realize the usefulness of such a thing, then clearly she'd need to spell it out for him

"So I could replicate it."