I wish I could answer your questions but they seem to be related to today's episode which I haven't seen and I don't wish to see either.
The only question I think I can answer is the last one. And the answer is - for Kunal. That idiot has no sense of his own future. He would readily sacrifice everything he has tirelessly worked for in a heartbeat for his maa and bhai (and now, bhabhi). I doubt he has any assets. The one company he owned is now in Mishti's name so where does his and Kuhu's future lie? The only way out of this situation was to divorce Kunal which I have been hoping for because Kunal 2.0, along with being a dum-dum, is a Grade A a-hole husband, but this is a DKP show so divorce is out of bounds.
In my head filled with alternate endings for this show, I consider Kuhu walking out of the house after Kunal asked her to become a surrogate. Let's consider the bit where he meets Kuhu at night also canon. I see a fight ensuing after he said, "ek galti toh sabko maaf hoti hai na". I wanted to kick him so hard when he said that because he is way way past ek galti. I'll stop now because I've beaten Kunal to a pulp in my head.
I think it would be impossible to answer my questions if you haven’t watched the episodes (I do not recommend it at all). Consider it the end with Kuhu walking out when Kunal asked her to be surrogate. I loved that episode on all levels.
Alternate endings at all levels is the best at this point since they seem determined to destroy everything that made this show worth watching and discussing.