At this point, Ron knew the smart move would be to just bite his tongue and let the matter go, even if he really wanted to defend his decision more. He especially resented the implication that he'd deliberately put them into a risky position, not least because there was an element of truth to it. But things were already desperate for the three of them.
Still, he was unable to bite back a nasty retort to her ultimatum. "'Course not, wouldn't want you getting your hands dirty. And no, he won't be."
Ron scowled as she left, not even saying goodnight in reply, he was still too angry. With her, with Harry, with himself, above all with their entire situation. It wasn't as though he liked dealing with drug dealers and gamblers and other assorted petty thugs. But if it would help keep Harry and Hermione alive, he'd do it, even if they didn't see things the same way.
Running his hands through his hair in frustration, Ron groaned and turned to Harry with a rueful half-smile, "Well, that went well."