It might not be lying. Sometimes people change their minds as they get more facts. However, if there are other signs like avoiding eye contact, being defensive when you ask about it, then it could be a sign of lying. But if he is open and honest about why he changed the story, it's probably not lying. For example, if he initially said he could pick you up at 5 but then changed it to 6 because of unexpected traffic or a last - minute meeting at work, that's a normal situation.
First, you should talk to him calmly. Ask him why he changed his story. Maybe there was a misunderstanding or he just made a mistake without bad intentions.
First, he should stay calm and not overreact immediately. Listen carefully to all the details she is sharing. Then, he could suggest seeking professional help like couples therapy to work through the issues and rebuild trust.
He should listen attentively. Make eye contact, nod his head to show that he's following along. This simple act can make his wife feel valued and respected.
He should first listen calmly. If he feels uncomfortable, he can gently tell his wife that this topic makes him uneasy. For example, he could say 'Honey, I don't think I'm comfortable with this kind of story.'
It could also be some other character who is not as prominent but still plays an important role in the story. Maybe this character has a backstory that is related to the main plot but is too ashamed or scared to tell anyone. In the world of 'Horse and His Boy', there could be various characters with their own secrets and motives for keeping their stories untold.