I think it's upto the cv's to not to make it a threat in ishru relationship.
In the beginning too Mrs. Iyer said that they did treatments for ishu and some percentage of cure will be to god. I think it's less chances. Because even in the real world I have witnessed women with complicated infertilities but were able to conceive after so many years of treatment. So I don't think that the pregnancy track is abrupt. It's just that they weren't a couple to have a biological baby before but now as their relationship had a wonderful twist it's expected. But it's true that in ekta kapoor's stories the impossible is possible. But nothing is impossible unless you stop trying.
The relationship between ishru shouldn't be affected. But the thing is insecurities of elder children is very common in the society. We were even taught in school about these things and how more attention should be given to the elder one. Which has actually happened to me where my parents have given maximum attention to my brother even after my birth which in return I have a wonderful brother. It's always the parents duty to treat all their children in the same manner. So I think the cv's should be sensible enough to show the growing bond between the siblings. And both ruhi and adi loving rohit, ananya,shitija shows that they're sensible children. And I also think that ishu is a very sensible mother and woman where she can understand her children. So I think that pregnancy track would be rocking but cv's should be careful to not to harm the present relationships😊 .
So I personally love to see a pregnancy track of ishu.
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