Heres my predicition. Ganga knows that if she hurts sahil, her kids will be hurt and she doesn't want that, she became rich and famous becuase of her kids as they are her life. She decides to show the love that she kept for her kids all those years ago when they should have gotten love form thier mother.
I think in the terms and condition sahil signed, it says that he will have to work with ganga and he cannot leave his work. I think that keeping sahil close to ganga, ganga will feel this is the way to get to meet her kids. Also if ganga gives a good money to sahil, the nakul will not hear the taunts form manthan and nakul may be gratefulk for that.
What do you guys think, Plz reply.