You can actually have Captain's Club completely link your and your spouses Captain's Club Points Total together. I had more Captain's Club Points than my Wife and I had already qualified for Elite. While onboard I and my Wife went to the Captain's Club Desk for an unrelated reason and the host let us know that she could link our accounts so that although we would still both have separate Captain's Club #'s we would have the exact same Points and therefore exact same Status. She printed my Wife a New Card on the spot and it's been that way ever since.
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Plus my Wife can now never leave me or face the possibility that I'll unlink our Captain's Club Points Accounts and therefore she will lose Elite Status...harharhar