My DM had three siblings, two of them very like her, but the other one, she's such a show off, to the point of being a total bitch at times!
"Our B's house is very comfy, it will never be as posh as mine of course, but that can't be helped!" DM's house was worth almost three times as much as hers, and in a far, far, nicer area!
"It's a shame that B's, J's and P's children aren't as bright as mine. Still I suppose they can always do some sort of factory work!" We turned out to be a Barrister, a Doctor, a Librarian and a Police Superintendent.
When my DM had a shower cubicle fitted, the comment was "Is it because you're too fat to get in the bath?" DM was 4 inches taller and weighed 18lbs less, was very slim, but had hip problems so couldn't get up or down in bath!
My DH bought me a gorgeous eternity ring, when Aunt J saw it, she said "Well, the size of those stones, they're definitely fake". It's not fake, it's diamonds, and it's not huge, but it's bigger than hers, which is just not allowed!
None of us have ever been able to work out why she's this way, she's the second eldest, married a man with a very good career, travelled the world with him due to his job, and has basically led a blessed life.
Still, there's nowt so queer as folk!