Call Captain's Club and have them link his account to yours as sharing the same address. He will still have fewer points but he'll be Elite like you are.
Relationship Points and Status
If two adult members over the age of 18 reside at the same address, they have the option to link their member accounts together by calling 1-800-760-0654. While each member still earns points based on their individual sailing activity, both will have access to the points and tier level associated with the member who has the higher Club Point balance. If the members ever stop residing at the same address, Celebrity may unlink the accounts. Members can also request their accounts be unlinked by calling 1-800-760-0654. Each member will then only have access to the points and tier earned individually.