Usually the younger woman has children to other Thai guys in the village or near by.
Quite often the were what is known as the “Town Bike”. Everyone had a ride.
Mostly these couples didn’t meet in the isolated village up in Nakon Nowhere.
The villagers will all know they met in Pattaya or Bangla Phuket etc.
So there will be zero jealousy as no men in the village wanted these girls anyway.
The Farang if he can not speak the local lingo will be treated pretty much as the village idiot.
The Thais are not big on causing the Farang or his little teerak to lose any face and the Farang won’t understand any of the sleazy jokes about his teerak anyway. Teerak knows what’s going on but mostly just ignores it.
The Farang will think he is popular smiling and making hand gestures and pulling faces when in shops etc trying to explain himself which will just re-enforce his image of being The Village Idiot.
Ignorance is bliss. The wife won’t really help the Farang with language skills because it is easier to hide her affairs, her gambling and other issues and she keeps him in the dark like a mushroom and feeds him sหเt.