[She sighs, but it's fond and affectionate. Shirou reacting like this isn't surprisingly in the least. She just wish he'd understand.]

Of course. You've already forgiven me for so much, and you've done even more for my sake. I know I can always rely on you, no matter what you say. [She exhales, a breath shaped more like a laugh, before pressing her lips against Shirou's forehead. She'll stay by him for as long as he wants—forever, even.] So it wouldn't be fair not to do the same for you.