If by behaving you mean River's smug, coy satisfaction at seeing the universe's most dangerous (and insane) Time Lord flinch and turn up his nose and the Master's seething hatred and disgust currently aimed at the project in his hand. Then yes, they're getting along swimmingly. No one's lost an arm, a head, or a heart at this point. So there's that.

"Doctor." River's voice is fraught with worry when he tries to get to his feet. Does she try to stop him? No. She's used to his crazy ideas of 'helping'. Doesn't mean she has to like it though, but she will stop hovering like mother hen. "Sit down before you fall down." She can see how wobbly he is.

Oh joy, she feels her nose tickling from being around the Doctor and wiping that slime off him. Grimacing, she covers her mouth and gives a tiny sneeze. What? Don't look at her. "Nose tickled." She excuses herself and flounces off to help the Master look for his resonator.

One. Big. Happy. Team.