The Mother-in-Law (Sally Hepworth)

I related to Diana more than I would like to admit because I am an awkward person who also likes things a certain way.
From the Synopsis: "From the moment Lucy met her husband’s mother, she knew she wasn’t the wife Diana had envisioned for her perfect son. Exquisitely polite, friendly, and always generous, Diana nonetheless kept Lucy at arm’s length despite her desperate attempts to win her over. And as a pillar in the community, an advocate for female refugees, and a woman happily married for decades, no one had a bad word to say about Diana…except Lucy."