How will Radhika tell her father to stop the wedding who has done so much for this wedding? How will she break Dev's heart knowing that he will die hearing that?
I think Radhika should explain all this to Vaishali and ask her to stop the wedding herself if she wants to. This is devastating to put the entire burden on Radhika, poor girl not only she has to go through the biggest pain of her life, she also has to throw the arrow at others as well.