I don't ship it (though I don't ship anything pretty much.. in fact I dislike shipping, but that's just me and not important..) I think he was just shocked to see her acting that way/didn't expect it. I mean he wasn't blushing in the original, just kind of looking like: huh what? I don't think I ever even thought of it possibly being like that at any point when seeing this episode (though again that may just be me). Still I was very glad to see character development for her.