She needed professional help before even meeting Lori and Chad. She has a strange personality. It's one thing to be naive or gullible but she's way beyond that. I thought Archibald did a good job showing how absurd everything she believed was and made her look like a loon. I give her credit for sitting there and admitting it. She is definitely the personification of cult mentality. Lori was right when she said she was like a child who would believe anything which is probably why she had the 100% trust factor.
BTW, isn't it weird that Audrey moved to Missouri, where Archibald brought up that Mormons believe Jesus will be returning, But SLC is HQ? Why aren't they all in Missouri and why did Chad come up with Idaho as their safe place?