[That she doesn't rise to reassure him is actually, well, reassuring - if only because he can sense that understanding there, and it's really just a matter of making it clear. Aramis loves freely and deeply, but in the end, he thinks, they belong to each other. And he'd defend him until his very last moment, if it came to that.]
[So that she doesn't start immediately giving him platitudes and instead seems to get it, well... that, more than anything else, is what makes him finally look a little less suspicious.]
So long as we're clear on that. [He doesn't know what would happen to him, if he didn't have Aramis.]