Mansi - Jodha has seen Jalal's craving for a child. Not just as a father but also cos he realizes he needs a waris being a Shehenshah. Jodha saw very closely how much Jalal felt gutted after he realized Rukayya lied to him and she was never pregnant. Even then Jalal felt it was cos he pushed empty cradle!
So Jodha wanting to tell him in DEK is symbolic - she wants to tell him what he craves most a child of his to continue the Mughal empire and to sit on the throne after him is coming. So it is very sweet and loving of Jodha to want to tell Jalal in DEK!
totally agree with you..