His cheeks and nose are cold with the temperature of the air and from the race to the spot where they are now, but the rest of his body is warm, with her pressed against his chest and his arm wrapped around her middle.

Doc doesn't deepen the kiss (not much, anyway) but he takes his time in kissing her as properly as one can (which in the case of their time and upbringing, there's no chance in Hell of this ever being proper but that's beside the point) when he's at this angle.

He's in no hurry to break that kiss either.