[He could reply to that - he has plenty of them floating around in his head after hearing it - but when Teddy kisses him, he simply leans in and returns it with enthusiasm, letting his response be conveyed through their shared embrace. At this point, they really don't need words to express their feelings about one another (even if it does help) and he's more than happy to get back into action.
[action]
They're supposed to be celebrating, after all.]