I don't think this statement is fair. A "young Filipina"? How about young British lady, or a young lad.
I knew some Filipinas who stick with their man. That's because of "marriage of convenience" and "living in contentment" is what in their minds and get to love the person a long the way.
You do really get people change after marriage, that's why the divorce/separation/annulment. It doesn't only happens in this country.
When respect and loyalty is no longer there in the union why stay? For the sake of the child? Poor child to grow up with such chaos.