"Thank you," Regulus says. It's also suspicious, but he makes sure his easy smile and civil tone conceal that he's thinking that. He's not really sure at all what Natasha really wants, but he's sure there's something. Everyone wants something. "I'm not used to having allies I can trust. Things might have been different if..." He sighs. "But, they weren't, and I tell myself I can't dwell on that... even though that's harder to do than it is to say."