I dont think theres any love story left between them...Delu is treating rajiv like a dog and she was simply using him in the show as per her convenience ..if she had even one iota of feelings towards the poor guy she wouldnt hv reacted the way she did to emotional outburst of rajiv.
I bet she will try to mend things with Rajiv soon on the show as with the animosity her dear bro had created for her in the name of brotherly love, shedefinitely needs rajiv s support .
They can go on with calculations on the show to support each other but i dont think she cares for him.