I agree with you. You see, being a mother is a beautiful feeling. But so is being a father, a brother, a sister, a wife, a husband etc. In short, having a family/relationship is a beautiful feeling. But in India, we only glorify motherhood and mostly if it's biological motherhood.
I understand that the feeling of being able to carry a child inside you is a special feeling. But so is raising a child not your own into an upstanding, honourable member of the society or being an excellent life partner to your spouse and looking back to your journey as a couple through thick and thin, richer or poorer and realizing that the marriage is a success or being able to reach out to one's family knowing that they will always be there with open arms.
Yet, when it comes to that one relationship of biological motherhood, every other relationship falls short. Is a relationship between a father and a child any less important? Is a relationship between a husband and wife any less important? Is the relationship between a brother and sister any less important?
No. Every relationship has its own importance. Long back in my balance post I wrote that every relationship has its place, respect, dignity and boundary... When we let one relationship cross over into another relationship's boundary, we reduce the respect and dignity of both relationships. Because then the relationship which spilled over becomes undignified and selfish and the relationship which got short changed becomes disrespected and failed.
That's exactly what happened here. Ishwari was Dev's mother. When Dev allowed her to interfere in his marital relationship and dictate terms and condition for it, he doomed his marriage. What is left of his marriage can't even be called a decent relationship, let alone a lifelong partnership like marriage.