May be Nandini found out that Mandira or someone else was planning to try to kidnap the child, so she managed to hide him/her?
Never mind. It's too far-fetched thinking. đ
It just occured to me from Nandini's facial expressions after she saw karan's confrontation with Mandira in today's episode.
I don't think it's Meera. She is just trying to benefit from the uproar.