If he's meant to look ashamed at the secrecy, if he's meant to feel guilty at excluding her, he doesn't. He stares at her flat in the face, gun still gripped in his hand at his side, and he cocks his head a little in an it is what it is gesture.

"It's the best one we got, and you're not gonna stop me anyway." It's frank, it's flat, and he brushes it off without a second thought. He pins her with a hard look, like he's annoyed and disappointed with her. "Either way, we've got bigger things to deal with right now. You need to get your head in the game and start focusing on the present- like figuring out how to make the most of this. You need to do some tech, or stock some supplies. Do something useful."

Interrogating him about his mission isn't useful.