Well, he accepts Ayaan with all his heart, along with Nuzhat and Nikhat. He understands that it isn't the children's fault when the parents, especially the father, makes mistakes.
It isn't Zoya's fault she is Ghafoor's daughter. He tried to dissuade her from investigating because he already feels that her father doesn't deserve any effort because he hasn't made the effort to find Zoya.
He maybe conservative but in this case, while it will be a shock to him, he will not treat Zoya bad. Besides, when he found out a woman had died in the factory fire, he felt sympathy for her relatives (indirectly, for Zoya) and that building did burn down due to his father.