A saying 'A person has to learn only that from the history that men have not learnt anything from history' truly applies to Virani's.
Remember Tulsi got Gautam and Ganga married while Gautam loved Tesha? They could go separate ways and Ganga married Sahil and Gautam married Tesha.
They had no problem annulling that marriage.
Then Tulsi got Ansh and Nandini married and rest is history.
Why can't people get annulment for Eku-KT marriage and save everyone tears and viewers headaches? what do you think?