I am willing to rule it completely out as the age difference should put it out of question completely, however, it could be that this young girl who looks a lot like DM's first wife when she was young and that could lead to confusion between the Santu and DM.
Or to run completely wild with my imagination Anamika could create confusion b/w Hiten and Toral, causing the two to come closer. I don't know but the way they introduced Anamika means something unexpected is to occur and that fact that this is Balaji I have no hopes of anything normal!