I’m both a bit shocked and not shocked you got stopped like this.
Seems most get ignored if not living in TH full time. Only 6 months a year I’d figure they wouldn’t say anything about. And at worst would just give a warning vs go straight to detention and (until she signed something) denial of entry.
But not shocked because clearly they are back to being strict and 6 months a year on visa free entries is pretty grey area.
Were you truly out for 6 months or more before you came back in Nov?
Do you have any history of staying more than 6 months at a time or in a year?
location of marriage has nothing to do with if a location will allow you to divorce and in general countries recognize the marriages and divorces of each other.