Holmes is happy when his orgasm follows soon after, as his body is very near to giving out regardless. He's still quivering with the force of his climax when he collapses atop Watson, breathing raspily. His first coherent thought is that it's very fortunate that Mrs. Hudson is a heavy sleeper, occasionally using medicine to help her to sleep (thanks to Watson, of course), and that her bedroom is not beneath their sitting room. Now he's ready for bed, though he's not any more ready to go about recovering their clothes beforehand.

He presses his face against Watson's neck and breathes heavily, his heart still pounding and the sweat only just beginning to cool on his back. He doesn't think he's capable of anything more than clinging to Watson at that moment, and praying that he doesn't fall asleep here.