I am no mum but from what i have seen and studied i have observed that when a child grows up they tend to be very inquisitive and sensitive and if not dealt with properly they can get hurt emotionally.
In this case a father. I think as the child will grow and observe other children having both parents he or she will question their own parent's where abouts...sometimes they can say things that could hurt a mother aswell. The can at times not grasp the fact that the father is not present.
What if Bani has the child and is able to provide for those necessity material things one needs to rear a child but how will she fill the gap of a father. Its different when the father is dead and u have so many memories to show the child as they grow up...in that aspect atleast they have pictures to look at and stories to hear but in this case it can get hard.
I think no matter what relationship a husband and wife have they are both needed when it comes to their child. Thats why in most divorce cases the parent no matter whose at fault ...both have access to the child.