[Steve manages to fight back a smile at Tony's instance that he doesn't need help since to him, cooperation would be help. But he knows Tony's probably not used to be part of a team yet.]

They'll cooperate eventually. Just takes time to get everyone to realize they have similar goals.

[The 'few of Thor's girlfriends' confuse him until Tony mentions a Steve leaving and coming back. Not more than one, then. Probably different versions. Then, he connects who had been sent home.]

Tony - I - [His first thought is of Peggy and how much worse it for Tony to lose someone who had been with him so long.]

I'm sorry, Tony. Nothing I can say'll make that better so I won't even try.