The mother you couldn’t place is from MyGown and Your Gear and from the Thai Love Stage. And it does feel like Luk is covering for someone. Maybe even Mai himself. The way she was looking at him when the families were watching the outdoor movie was almost like she knew what he was thinking.
And I don’t know if you noticed, after the kids got picked up by Mai and Luk and were in the park, Phukhao gave little Kongkwan a very Ohm look at 6:10 marker. It was so cute. I’ve seen Ohm make that face in Bad Buddy and in video clips with Nanon.