The earthquake scene recreated at the sets of 'Yeh Hai Mohabbatein' may have landed Ishita in danger, but it has surely revealed Shagun's true identity to Adi.
Shagun's act of abandoning her children during the earthquake made Adi realise her selfish nature. This made Adi disown his mother. He said, in simple words, that she is not his mother anymore,'Ishi ma is his mother'.
While we saw Shagun 'breaking down ' on screen on learning about Adi's new found hatred for her, we will have to wait for sometime to know if those tears were real or they were crocodile tears.
As of now, It seems like Shagun's realisation about her son's hatred for her may change her as a person. But if she continues to be with Ashok, then this can lead to an entire new plot of revenge!
While Shagun is battling against the evil in her, Ishita is battling for her life.
Whether she survives or not, she has surely won the heart of Adi making her Ruhi and Adi's 'Ishi ma'.