[It does help: his remark gets her smile to brighten, an she bites her lip to stop it from widening too much.]
Perhaps it was just so obvious that I didn't even think anything of it. [They've always been Aramis-and-Porthos, after all, ever since she first got to know them, that thinking them as separately seems almost impossible.]
[Finally, she looks up at Porthos, her smile fading into something more serious.] You don't have to be afraid with me. It was a surprise, but that is all. My reaction... it wasn't meant to convey anything else.