Ayaw kong magkita ang fiance ko sa babaeng nabuntis niya, kahit na may anak sila

Well, your fiance has an obligation to support his child. He also has the obligation and the duty to help raise the child. If he does not support the child, the biological mother might file a criminal case for economic abuse.

I understand that you want your husband to cut all contact from the mother, but it cannot be done without harming the child. I do not know what to tell you.

Hindi kasi mababakuran ang lalaki. No law will stop him from seeing his child and since the child lives with his biological mother, they will always see each other. I think you should talk about it. Maybe he can see the child at the home of the child's grandparents or uncles or aunts, so that he does not have to see the biological mother of his child.