Not so easy. I work full-time and our kid has to be collected from school at 12 every day. Chaengwattana is the other side of Bangkok. My wife can't see what the problem is. I think I'll let her handle it!
She can't go back to Chong Mek as it's 8 hours away. When she goes back to Laos in April it will be from Suvanarbhumi Airport and it will be just her and our 3-year-old. Her Extension is valid until 30 Nov, as is her re-entry permit and the departure card which they collect has the correct admitted until stamp. What's the worst that can happen at the airport, bearing in mind she'll be holding a 3 year old?
- if she was born here she is fine. When you get her a passport and she leaves Thailand for the first time you show her Thai birth certificate at Immigration and they write in her passport and stamp her out of Thailand. There is no overstay. If she comes back to Thailand she either needs a visa or a visa exempt stamp. If she overstays then, she will get an overstay stamp in her passport but as
They can get one from a nearby Consulate (Vientiane maybe, or your home country). Then you can add them to your Extension. If they are on tourist visas you can change it to 'O' visa at Chaengwattana Immigration then add them to your Extension.