It totally looks like Tim's blowing him a kiss in the second to last panel, there. :D Which is a good thing, of course.
But I really wish we had more stories where the characters could have a moment or two of quiet, every now and then. It's such a nice, sweet, understated moment between them.
And the hairkissing is probably at least in my top five favorite Batfamily moments of all time. Dick does Awesome Big Brother so well.