Actually getting handsy or not, Natasha still hums as he backs her up against the car, and loops her arms around his shoulders so she can pull him in for a decidedly unchaste kiss. It helps sell the act, after all, and it's not like she hasn't done worse for the sake of other acts. This is nothing.

When she breaks away, she takes a moment, only half-feigning breathlessness as she looks up at him, expression smoky, and then softly, points out, "No alarm."