Well you are right bharo.
There shouldn't be need for all these crap for Siddhi to move on; but actually she does.
One thing we must accept is SINAL are one and no matter what they say; they can't lead so called life without each other.
Look at Kunal, he has his son with him for 9 years and yet he is not able to move on. Kunal think Siddhi hates him; his circumstances force him to think she may be betrayed him, yet his heart is not able to accept it. Deep down he still waits for Siddhi to come back.
Same thing for Siddhi. Even though Siddhi made conscious choice of selling Kunal; it was by force. She accepted Kunal would have moved on; but deep down she feels he's still hers. (remember her poetry you are mine and will always be) As much as she wants to move on, she can't.
This is all because SINAL have formed such bond they can't think beyond each other.
i agree, for both of them their kids should be enough to move on. but their love for each other is much stronger than meets the eye (i like that fact)
Until both feel there is no chance for their life with each other; they won't be able to think beyond it. Such shocks are there for them to push they must start thinking about their kids in other direction. They have been suppressing their feelings and they will have to work hard moving forward. I know it is not ideal to have such silly nonsense for Siddhi and even Kunal to move on; but they do need some shocks.
I feel moving forward; they will put more and more focus on their kids; but deep down the pain will still be there. No matter what they show outside thinking about each other; Siddhi can't hate Kunal and Kunal can't hate Siddhi. If anything, they actually hate their selves for whatever took place.