Altria is just happily enjoying her cocoa, so she's very much missing Tsuruno's realization, as well as just how differently Wanderer treats her. It's sweet and delicious, a nice distraction from the throbbing in her ribs and her hand. She knows she's going to have to drink it carefully, but...

Having a treat after something so brutal is unusual. She wants to bask in it.

So she's just humming quietly to herself as she takes a careful sip, not at all focused on the conversation. Tsuruno and Wanderer are talking about logistics anyway. She doesn't have it in her at the moment.