I have several invitations to address to couples who are married, but have different last names. For example my aunt (mother's sister) who would be the main addressee, hyphenated her last name. Do I still address it to Mr. and Mrs. Husband's name? Or do I address it to Mrs. Hyphenated name and family then put him on the inner envelope? Or, do I put BOTH (Mr. husband's name and Mrs. Hyphenated name)?