No. You really can't. [Of course they'd be upset.]
[Touches his arm gently, squeezing it and smiling at him a little, sympathetically] Sometimes... Sometimes it can be really difficult, to do what you think is right, to give the people you love their best chance. But...
[She doesn't know if it is the best choice, but it's also not her place to say so - and she can trust that Aramis would do the right thing, ultimately]