[It's too late for you because Keith had already long thought about it before all this, never mind right now, against any better judgement, not least of all because of all the affection now. At the same time, he sees the color to Shiro's face when he draws back and it's almost instinctive.]
Shiro, you're...
[His hands move without thinking. Taking either side of Shiro's face, lightly, but also maybe not so tentative, just looking at him like he kind of can't believe he's real. If anything, all the things that are different just add to that sense of wonder.]