If Naseer disowned her coz of Azaad, then I don't think Amaad and Kaynaat would've happened. 😆
If naseer can marry a woman, without knowing her past, he should;ve been ready to accept her with her kids.
I think the reason is something else.
Maybe he accepted Sanam2 and Azaad, and later on S2 did some experiment to gain power, which might've gone wrong, resulting in Kaynaath's handicap. And hence the fallout. He adores his daughter, doesn't allow the mother anywhere near the daughter.
or maybe S2 had a son, before she had married Ahil. And that son is Azaad is Amaad is S2-Saif son.