Steve can tell that Clint is enjoying himself, which is the idea, but he thinks that he can make it even better. He pulls off a little, bobbing his head to give that much more pleasure to the archer, then getting one of his hands beneath him. He's getting the idea that Clint is into pretty much anything Steve might think to do, so he cups his ass and considers doing a bit more teasing with his fingers.

He pulls off very briefly, only to say, "this okay?" while wriggling his fingers in Clint's ass crack and, "you can fuck my mouth, if you want."