@Andy *********
and from your vague post how would know what kind of visa you have or what reason you got it for?
That's why I started with an easy question. There was no insinuation about your intelligence at ll.
SO now that we got that out of the way, You CAN indeed apply for a 60 day visit thai family extension based on marriage to a thai national. GO to your immigration office or have your thai wife call and get the hand out of what's required.