Before Hajra, he loved Mahnoor a lot because she was his first and only grandchild.

Let's see it from a different angle Hive account@dlmmqb . Before Hajra, Mahnoor was only 2 years old. By that time, her independent personality was not that evident as it is now. So, if she grew up into a personality she is now without Hajra being available for the competition, would your father be appreciative of her or would dislike her behavior.
I won't say he doesn't love her today. It's just he doesn't appreciate her noncompliance.

Your husband might find you beautiful, but if he keeps comparing you to someone else, his perspective about you will change.

Here my question is a bit different. Are there no competitors available for me in this regard? There certainly are. Many pretty ladies are all around but my marital life or my husband's love for me are not affected by them. It means the MERE EXISTENCE of competitors or competitions is not an issue. Everything boils down to how we perceive those stimuli and then how we react.