What exactly is the reason that no-one is telling Garv about Kali's deception? As the father of the fake child, surely he has a right to know.
Even Harry knows, I think all the characters in the programme will find out before Garv does!!
When Kumud married Garv, Kali would look for every opportunity to come between them, and now that Kumud has evidence why they shouldn't be married, why isn't she telling Garv?? She could at least tell the family, now that Sohan knows it will be more credible. Or maybe he should tell, I mean he told Kali about her mother, so maybe he has the guts to tell everyone about the faked pregnancy.
I think its because Ekta wants to create a greater rift between Kumud and Garv so it takes ages before they get together again. Garv will eventually find out, but he will hate Kumud and Kshitij for not telling him, blame them for ruining his life and cry for about 20 episodes.