My take on this is that Ak never had any responsibility to tell Abhi. I don't really understand why they showed her desperately trying to contact him or anything. But she always had a responsibility toward her son and towards her family. Her revenge wasn't in the not trying a thousand ways to reach Abhi, but her revenge is in trusting a stranger, not asking for help from Goenkas, and hiding out in Kasauli.
If she called him once and he refused to listen, fine, her responsibility is over. Then she should have contacted Goenkas, told them the situation, and told them she needs money or access to her mother's fortune. Setup a nice life for herself anywhere in the world. If she wanted to have Nav be a father figure, that would also be easily done by just being friends, no need to marry the guy. I don't have an issue with their marriage if she took her time and fell in love with him, and then got married. Children can actually comprehend complex relationships, they don't immediately think their parents need to be together. That's just society. Ak could have slowly told Abhir that Nav is his adopted father, but he has a real father too. I know it would raise a lot of questions, but it's better for the kid in the long run.
The whole situation could be handled in a much better way.....if it was not for Ak's revenge on Abhi. Her each and every decision is based on what Abhi did to her. That's just not ok, especially as a mother.
Now the counter-argument, if she told Goenkas, Birlas would have found out. But, like, wasn't that why she contacted Abhi in the first place? No, she wanted Abhi to forget everything and run to her. If that doesn't happen, she will move heaven and earth to hide the truth from Abhi and everyone that they have a child. How is that not revenge? Imo, Ak has spent the last six years in revenge mode, it's shown in everything from her anger to her fear. In all of this, she did complicate things further. If she never wanted to go back to Abhi after the divorce, no one was forcing her to. After what he did, I am surprised people are still supporting him. She could have built a better life and especially one that was real, not just an illusion.
10