It is so unlike sahiba character that she is staying with a third person without marriage. She has been earning everything for family then she can earn for herself also. Blank birth certificate will be the link for Angad to know the truth. No romantic angle between Diljeet and Sahiba. Hiding truth from Biji and family. Biji will definitely oust sahiba once she knows the truth. On what ground now sahiba will fight the custody battle, she is not married and financially weak also. I think they won't need the court case also to run. On one side Diljeet can break the window and on other side he agreed with sahiba for not participating in the competition. Such a shit writing.
There is no strong reason shown by sahiba that why she hide from Angad after giving birth. Only thing i can think of it that Angad rejected her baby on call. She accepted it as her fate. That clearly means once ANgad will know he will demand his kid she will easily give up her baby.
Angad dialogue for sacrificing everything is foreshadowing. Angad always recall moments of sahiba or pregnant sahiba. He was never shown to recall moments with his dad. I agree loss of baby is trumatic, but the baby was just 1 week old. 6 years bitterness is not at all justified for baby loss. The bitterness he devloped over time is due to loss of baby and inder death mourning does not exist at all for him.
With every track writing is getting deteriorated.