Any normal person

Any normal person would have told about bua's and mil's ill deeds to Yash but ask him to be patient and not to react angrily. But aarti will keep quiet because she is the typical Indian heroine who will rather keep the hero in the dark and take all the blame silently.

And all his brothers kept quiet without informing him what took place. They would rather allow the marriage to break down than tell the truth.

The only silver lining is how aarti held bua's hand and answered her mil about not giving divorce.

Wish aarti broke bua's hand.😉

I really feel sorry for Yash who does not know the truth. Yet he is handling the situation rather admirably.
Keeping quiet by the bahus has become the norm of all the Indian soaps.