Nandu Rules!

Seriously.

First, when Radhika trusted Arjun- she went and gave Radhika clues..basically told her the whole plan :D
That's how we could get ArDhika's wedding!

Then, when Arjun said he would divorce Radhika- she forced them to live together.. Seriously, so smart.

Now, when she needs ArDhika to sign divorce papers- she goes and tells both of them that they love each other! Wah, wah, kya dimaag paaya hai!

As an annoying plot device, she's very very useful to us!