Zoya not having shared her doubts about Imran to Najma (forget Asad) is an insult to Najma's intelligence. If Najma has grown up enough to get married, she should have been given the opportunity to make the decision. Its her decision and her decision alone. She will have to live with the pain when she finds out. Zoya had no right to take that decision from her. This is not called sacrifice.
It is stupidity to show something like this as sacrifice. Will Zoya be able to carry Najma's pain when Najma finds out?
When you truly love a person - be it whatever kind of love...sisterly, brotherly, etc. - it is important that the person you love is given an opportunity to make his/her decision. Fathering a child whether it a one-day mistake or a 100-day mistake is not something small. It cannot be taken lightly.
Najma should have been allowed to take the decision of making her choice of wanting to go forward or not. I hope later on they don't show Asad making a "sacrifice" for Najma by getting married to Tanveer. It would be disgusting...
I wouldn't a brother's love of that kind. I would want my brother love me so much that he can be honest with me with any matter that concerns even if it brings me pain. I would he know he respected me enough not to insult my intelligence.