He sees Susan's look, as much as he wishes he hadn't. He doesn't want to tell anyone what happened, he shouldn't have to. It isn't important! Still, if he made her cry he guessed it was sort of the least he could do. He sighs, crossing his arms in front of himself.

"Our parents were killed by ghouls."

There, he said it, and he has no desire to elaborate on that point and so that's all that needs to be said. He has officially done his part. In fact, he turns around, facing the exit of the tent, just to make it perfectly clear that he was totally done with conversation.