Let 'em say we're crazy!
"Nat," Bruce swatted her upturned butt in the least playful way he ever had. She was laying face down in the oversized bed they shared on Asgard, still asleep. Because, y'know. Last night. Anyway.
"Eva asked to see me this morning," he explained as Black Widow came to. "I don't know what to do..." He'd already spoken with the queen. His vagueness was probably already annoying Natasha, so he added to his story. "She's trying to find a replacement for Nate's position." An apparently, he was in the running. There were others, she'd mentioned... and Bruce was already an 'adviser' and scientist to the royals. Nat was a member of the guard, more or less. They'd definitely thrown their lot in with the Mightiest Avenger.
"I," uh, "I don't want Hulk advising her to, y'know, smash. Thor has Heimdall, right, so I mean, and Eva isn't in charge of..." all things. Articulate, Banner, for the love of God. "She's going to be in Helheim a lot." That was the gist of it. There, finally. Nat was wearing panties and a little tank top. For the record.