It could also be that VK was married before Nandini and that lady need not be Ram's bio mom but Ram thought of her as one. We will see that in the coming episodes. Also, as Real wrote the creatives are writing the back story now and hence I will discard the old info. They changed timelines, details of Sara's family, Vedika's dad not being dead in the car accident, so many loopholes.
We also need to understand that making a production is not easy so many loopholes will be there. Daily soaps are never tightly scripted.
Doods, the biggest shocker will be Vedu also is a victim of conspiracy. Poor gal!