@Michael *******
sorry to say, but the misunderstanding started when somebody called the visa you apply for “visiting thai family visa”
It is confusing, because there actually is a visa “for visiting Thai family”.
However, this is one of the 60-days tourist visa which are applicable.
A “visiting thai family tourist visa” is not the same as the “90-days Non-O family visa”.
The Non-Imm O family visa” gets issued to someone either married to a Thai wife, or having and supporting a half Thai child.
It is a single entry 90 days visa, out of which one can apply for the “one-year extension of stay based on being married to a Thai wife”
Yet, there is no obligation to apply for the “one-year extension”.
One could fly back home before the 90-days stay permit expires, and call it a “90-days touristic holiday”