"I told Konkona not to cast me in the film, but she insisted. Now when a director is insisting that to do it, and especially when she is my child's mother, how could I say no to her," Shorey said at the launch of production company Macguffin Pictures.
The couple, parents to four-year-old son Haroon, announced their separation last year.
However, Konkana maintained that she has no qualms in working with him as he's a "wonderful actor" and that they are still friends.
As far as her career and decision to be a director is concerned, Konkona said: "Honestly, I never wanted to become an actor either. Also, I never thought that I wanted to be a director. But, it's just that this particular story had fascinated me for so long.
"It's a story that's been with me for so long. I didn't think that I would write a script either. But the whole thing started getting bigger and bigger in my head. At some point, I thought, 'Oh, so this is how it's going to be like. I have to write and direct it'."
Konkona's directorial has an impressive ensemble of fine actors like Vikrant Massey, Kalki Koechlin, Gulshan Devaiah, Tanuja Mukherjee and Om Puri along with Tillotama Shome and Ranvir.