Providing for your girl should not include her whole family
People really don't read just go "that's the culture".
What kind of a fantastic culture where you need to provide for the whole family if you are a man, but only if you are foreign. The native men there can have no means of providing, in some cases jobless. But they are allowed to spawn in as many kids as they want. That is normal by their culture?
But within their culture it's the responsibility of the foreign guy to pay for everyone else's bad choice? How convenient
If you can't afford a child and need to rely on your sisters boyfriend for help, then I have a solution.... don't have a child.