It is not your job to clean up this mess. To atone for the sins of your father. You have placed yourself into a situation that you have no control over. Whatever the dynamic between your father and half the women in the Phillippines ,that is their deal.

Your wanting to help Ann is admirable, but she chose this life for whatever reasons. Only she can stop this. Dumping this mess in your lap doesn't make her any safer and only makes you feel more impotent. All you can do is encourage her to find resources in her country for getting free of this sperm donor before she gets knocked up.

Stay well clear otherwise.