It wasn't annoyance in Mary's voice. It was hurt. She'd been hurt that her dad seemed mostly unconcerned with what was going on with her mom, though that was perhaps just her own attempt at reconciling the dad she knew now with the much younger version of Dean that she was meeting currently.
She wasn't sure why he'd fallen off balance, though she'd wager a guess that he might have figured things out.
She frowned and chewed her lip, stowing the army man necklace again.
She didn't say anything, but instead waited for him to voice it out loud. There was a part of her that really hoped he did figure it out because it hurt to be this close to her dad with the other half of their family missing and not be able to look to him for support and for answers. A part of her just wanted to cry and a much bigger part of her wanted to hunt down whatever was responsible for this and shoot it until it was dead. She was pretty sure her dad could help with finding whatever it was, once he figured out whether or not he was going to trust her.