@Steve *****
you can get the one year extension of stay as Married to Thai directly from the family visit 60 days extension.
If you leave Thailand...be sure to have a re-entry permit to use on return to Thailand.
However... DO YOU STILL HAVE... the required 400,000 Thai baht in a Thai bank account in your name only ?
To Apply for the one year extension of stay as Married to Thai requires the 400,000 to be in your Thai bank account for a FULL 2 MONTHS before you submit your application for the One year extension of stay as Married.