Can my 45-year-old wife come as my dependent on a Thai retirement visa?

okay, let's see if we can't get some clarity on this

FIRST what type of "retirement visa" are you getting? I mean are you getting a year long, multi-entry Non-Immigrant Type O-A (Long Stay) visa <- the one that requires a police back ground check, 40K/400K out/in patient insurance, a medical certificate and proof of 800K baht or the equivalent in your bank there

OR

Are you getting a 90 day, single entry Non-Immigrant Type O visa where once you get your 90 day entry stamp you will apply for your yearly extension here?

If you two are legally married, she can get a non-o visa based as a trailing spouse, and then get a one year extension of stay based on being a spouse to a foreigner with an extension.

Is the marriage legal or de facto?