What is DPM's Secret?

Dont know what it could be! Will it go like Balika Vadhu ie Shiv was not Ira's son but was actually Madhu's son!

Seems Annpurna also wanted to be a singer in past but Dpm was against her! And then something happened!

May be DPM thinks Annpurna killed Kavita and he hid it from family!