I believe the CVs are keeping their options open. At this time they cannot kill off Mann or change the actor of Mann. So, they have decide to bring in a second potential Love interest so that they will gauge viewers reaction. If it goes well there is no need for Mann. Afterall what are the loose endings in the Dev-Geet-Mann story. The pregnancy and the culprit name is out. It was told in an open forum - pinky, Sasha and Aditi was there. How can they keep the truth from Mann. What's the story then? Convincing Daddi to except Geet. Why shouldn't she .. Geet is carrying Dev's child.
We have a new story Geet - Secretary to a new boss - Not an angry but very fun-loving and we have Geet now serious - no longer fun-loving. So there is now a reversal of roles from the Mann-Geet story.
Geet is pregnant and they have introduce a guy with nieces and he can't handle them. When Geet converts him he can tell become a father to her child.
They have still maintain the possibility of Mann coming back to get her and continue the story.
At this time it appears the CV is keeping their options open...