couldn't she apply to get the kids Thai Passports therefore negating the need for visas for them. As stated she can get a non-o based on thai husband or based on thai kids once they have thai passport.
Increased my limit on my app other day to make a 1m thb payment, didn't have an issue aside from face scanning in app. Reduced it again after payment made
So back to back and overstays and you wonder what to do? You have already labeled yourself. You might get lucky and not get blacklisted. Go back to Vietnam and buy a legit visa.