I was wondering same thing. What has happened to our Don? So she signs it and it gets filed, doesnt mean they are divorced. All Raghav has to do is call a lawyer and file a petition that states that they are being blackmailed, coerced, whatever and those papers should not be filed. Something along those likes. Atleast Lawyer se baat kare woh. Thats the best way to fix this. But lets not forget, this is ITV, jahan logic hawa mein filter hojata hai.
Total cheesy dialogue, I will kill myself but will not sign and he saying I will kill Mandhar. She can make a fake signature....and then claim that is not her sign. Baat khattam. But ofcourse they have to do drama.