Is it a good idea to gift your partner a dress that's a size bigger so that she'll be able to wear it in case she gets even fatter?

"Babe, I see you are gaining weight so, I thought I'll buy a size bigger so that it'll fit you for years"

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This is so genius and thoughtful
Not bad but not that great either
You're going to have a problem
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Is it a good idea to gift your partner a dress that's a size bigger so that she'll be able to wear it in case she gets even fatter?
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