What the angel does is shift slightly, a muffled quiet sound into the kiss, that isn't exactly a protest, just a reaction. He clearly isn't too bothered, because he's far from breaking the kiss despite it.

Carefully, he let's himself fully rest down on Crowley, bringing a hand to the demon's cheek, focusing himself on the matter at hand. But not too focused, no, that would be a waste, wouldn't it? All the sensations, all the emotions, the exciment, the thrill, the passion. Oh, there's so much of it.

He still can't believe they're there, at this point