Imagine putting someone with a fear of the outside world and a free-floating dread that people who actually like her are really laughing at her in a setting where everyone is living amazing lives without her and leaving her in a sort of dry dock of being a frustrated, isolated and confused wife and mother who finds that all the things she'd have earned by marrying the man her parents like are lies. The Liz of the present day is quite probably in the same horrid and self-willed Hell that Elly is in the reprints. She's not especially good looking, she's not a nice person, she doesn't really understand children, her husband treats her sort of like a joke and sort of like a servant, her life isn't really going anywhere and her children don't really respect her. Point that at friends who are doing better and you've got a recipe for a really bad mood.
About the only thing that can save her from the horrible realization that her limitations as a person doomed her to living the same half-life as her mother is the sort of denial of the obvious that her dad preaches as a sovereign cure for existential crises. By convincing herself that people who don't want to be her actually do, she might have a good reunion. This will put her at odds with an Anthony who knows that they don't want to be him but that's okay because he doesn't want to be them because that's risky but it'll look the same so they won't realize how different they are.