Re: The business stuff.
Natasha won't be the first to speak. But she'll agree to it without many follow up questions. She does not like this sceptre and control thing at all. Also it's preferable not to have to punch your best friend's lights out.
She may ask why Thor did not ask for the sceptre from SHIELD at any time since the invasion (assuming he didn't... if he did, well, drp SHIELD).