Natasha had 'requested' this, at the behest of her superiors at SHIELD (of which there was only one she really answered to; Nick Fury himself). The files she had, ah, liberated from HammerTech proved to be interesting, at the very least, and Fury had wanted more information on it, but didn't want Hammer getting spooked by agents visiting him in prison. Natasha had been volunteered because she was the one who'd procured the information in the first place, and also because she'd had dealings with Justin Hammer before.

He still didn't impress her. If anything, his being in prison only served to make her disrespect him more, considering he had an easier time of it in jail than most criminals, and that was likely because of his money. She hadn't been happy about the assignment, but she also didn't truly have a choice in the matter. So she'd rented the trailer, dressed in her uniform (complete with all weapons; she wasn't going to let Justin get the upper hand if she could help it), and sat on the bed, waiting for him to arrive. Her arms were folded, feet planted firmly on the floor, and she nodded to the only chair nearby.

"Have a seat, Mister Hammer. This won't take long."