I'll add to this that he is a better man than most sexpats. He works (although online) and sometimes he also had work permit when he worked for companies here.
And he takes care of 2 kids paying private schools for them and giving them the best upbringing.
I see it's a lot om bs and condemning here but that's not fair in his case.
he's the father on the birth certificate. But as he never married anyone and is taking care of the 2 kids alone, he never needed to apply for 100% custody.