How about this track.....
What if Sona falls in love with Ishaan by the time BadiMaa-Dadaji-Sona's plan comes to an end.
The day when Suhana finally realizes her love for Ishaan and is about to confess, Sona also starts developing feelings for him and is feeling really bad.
She leaves the kashyap family without informing anyone thus leaving doubts in Badi Maa's mind that she too is in love with Ishaan..
Also Suhaana gets a hint that Sona left the house cuz she wouldn't have controlled herself from depicting her emotions for Ishaan otherwise.....
What say guyz??