I wouldn't put it past Kokila to having gotten pregnant first and luckily with a son so that she could rear him to lead the family. Since she already knew that parag wouldn't lead the family.
I disagree with all people that are upset with Hetal for finally standing up. Kokila needs to learn her place like she lectures Rashi about all the time. She might say the right things but she is a big bully and other than Chiragh everyone puts up with her bs!