Unfortunately, she slyly uses her left hand to wipe the tip of his penis off before sucking him. Not 100 percent true ass-to-mouth, at least the way I learned it back in the 1980s and early 1990s when it was more of a really rare, but trophy-worthy act. The best ass-to-mouth encounters I had were women who'd take the penis, as it was from inside their ass, into their mouth. No wiping, no cloth, no stroking it with the hand to surreptitiously wipe off flecks of whatever was inside their magic orifice. Just pure, unclean (that's the highlight right there!) and natural.