Contact the property directly. Ask them to add your spouse's name to the ressie or in the notes. DO NOT say you won't be there. Ask them to note that she will be arriving before you/to use the CC on file for check-in purposes, as your flight will be later, etc. Technically certs aren't transferable, but if you do the above your spouse shouldn't have a problem. She might not anyway, but better safe than sorry/do all you can to make sure it goes smoothly. Also, remind your wife to say (if asked; not likely) oh he'll be coming in later, flights different, etc.

Cheers.