Thing was, Teddy knew that. He didn't see her shame, just nodded, because he understood. He didn't need to be convinced to stay, and he wasn't here to tell Cassie why she should; he needed to be convinced to leave. Leaving the war and all of that sadness behind also meant leaving all of the good things, too, as few and far between as they seemed sometimes. And there were a lot of good things to be had here, but they weren't the ones he had already worked so hard to have. Things like Billy. And he didn't want to just leave Billy to shoulder all of that sadness himself.
He focused on her hope instead; her dad. And at first he wanted to promise they would find him and she would be able to see her dad again, and his mouth even opened, ready for those words, before it snapped shut again and his chest heaved before he started instead, "Do you think my mom is here, too? I mean, my mom." Only when he thought to try to clarify, he realized his real mom might be alive here, too. And even Mar-Vell-- like really, actually alive. And he was sitting forward again, one leg dropped from the chair, gripping his shin, unfocused.