At least he's not avoiding telling her, he just doesn't want to dump it all on her at once.

And then she mentions Collin being dead and Sam's face falls. He was hoping that one of her few friends would have been around for her. But left with Gwen who she doesn't get along with and Celia who definitely was more than likely not going to help as much as she was pretending to...it makes him angrier than he's been in a while.

"Wait. Starkwall? Since when is the OIAR working with them? Since when are you working with some pseudo-military group?"