Just hand her a pair of weighing scales whenever she starts, guaranteed a bit of peace and quiet then

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It's called aversion therapy.
To be serious I leave it all to herself as I'm just not bothered about "things" other than cars - I have to go for a viewing of said "things" just at purchase time incase it doesn't all work out as planned so then I would get to share the blame.
I suspect the ladies version of this is a little different

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It all makes me smile anyway after 45 years of marriage and it works.