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You said yourself that your husband "has made a lovely, thoughtful, personal" gift for his parents. The fact that you are worried about the monetary aspect of the gift means you are not practicing the true meaning of Christmas. Do you want to spend the same amount of money to keep things "EVEN" or is there a gift you have in mind that is also lovely, thoughtful and personal that you would like to do for your parents? To me it sounds like the gifts have been made into a competition by the wife.
2 years ago on Mike & Liza's Marriage Ref: Whose Parents Are Worth More