We have all said after unwedding they should have started the heroine track from there, where Madhu is refusing to come back to RK and he used the 40 lakh contract to force her to do a film so he can be close to her and he can be seeing her and during that time pacify her and make her forgive him. They didn't do that they instead made her forgive him and they got married with full phere's. Perhaps the CV's realised they should have started the heroine track at that time. So here after the miscarriage when they are both blaming each other, Rishbala are separated, Madhu will do the film by Mr Mehta, RK seeing that she is acting with another hero, also wants to make her jealous and takes a girlfriend, with a view to hurting Madhu like she is hurting him by doing a film with another guy, it will all be for show, RK likes to cause a spectacle as we've seen at the recent party for people to be talking, and as people will already be talking about Madhu's acting it will give them something else to talk about.
If Madhu plays it smart and doesn't show she is jealous to fight with this other girl, and she carry on her work, I feel RK will send the other girl packing himself, and he will maneuver the situation where Madhu is once again working with him on a film project. He may have been banned by the producers association, but I think he has sufficient friends in high places and sufficient clout to make Madhu receive offers where he is acting opposite her only. Madhu will take the movies with him to prove she is unaffected (we know her character that's what she will do it for).