Rodolphus found himself rendered speechless after that. There wasn't anything left to be said that already been voiced and anything more would be his stubbornness against her pride and even though he was an ass it was nothing compared to her ego. But she was a Black. It was their right. So instead he curtailed a curse that came out only as a growl and gestured between them before snatching his wand off the arm of the uncomfortable chair where he'd left it.
"I want you to commit to memory everything I've said to you today, Bellatrix. Everything." He lifted his wand to apparate away but before he did he growled again and hesitated so he could add, "except for the part about not saving my ass." She was probably right, He probably would do away with him if she didn't put in a word on his behalf. Either that or never trust him again. He'd prefer to die. "I won't ever touch you again without your permission if you do."