You can apply for a work permit and work legally with the Non Imm O visa based on marriage, there's no requirement to wait for the 1 year extention of stay.
เตเต้ สตีฟYou can get a 60 days visit family extention with your name on your half Thai childs birth certificate in Ubon. You can also get the 90 days Non Imm O visa at Vientiane and Savannakhet, Laos.