Don`t make anything of it.
He's half-asleep still, and he had an 'oopsie'. Forgetaboutit.
Heck, even if he was wide awake, and you had neon name-tags plastered to your forehead, no harm was done.
I have 4 kids. Sometimes (often, actually. ) I look at one and say ; " Hey, T,..I mean E,..I mean V,..well, you know who you are ! Come here please !"
If they had an identity crisis everytime I did it, I'd be paying more for therapy, then I already need to pay for College.