"Think he'd even believe you if you did?" Lyra tried to picture the conversation with the Archer she knew, but she didn't know enough about how he felt about his dad - would he believe the accusation that his father had knocked someone up and abandoned them? Or would that sound like an attack on his father's character coming from someone who already made it clear she didn't like him? "Would Carla be mad if you told him now? Does your Abuela know?" Maybe that's what they needed - advice from someone older!