The purse of his lips in answer to that says it all - that she doesn't have to justify herself to him, really, that she drinks what she wants and he has no issues with it. It's not his place and, as far as he's concerned, it's not much of anyone's place, not in this kind of setting.

"Nothing's ever as clear-cut as all that, and while some of the French opposed the project, it would never have been sanctioned if all of them did," Klaus answers her first, easiest question. And then there is the harder question, because he isn't sure how she might take anything he says. When in doubt, tell the simple truth. "She was beautiful, and she had a love for metalworking that was rare in women of the time." It isn't a yes, and it isn't supposed to be a yes, not if Caroline is asking if he liked Séverine like he likes her.