Yes it is obvious that they don't want Anandi to know Nimboli Akheraj connection neither do they want Anandi to know about Nimboli's child marriage.
So Mangala and Nimboli will land at SN or Mangala will send off Nimboli to SN
Only while helping Nimboli and bonding with her will she get to know that the little one is a child bride and she also doesn't know where her family is I think Anandi will find out this while trying to search for her mother or when Akheraj gets to know that the little girl got shelter in SN .
These are the two ways of Akheraj Nimboli connection can come out.
But by then Nimboili Anandi Shivam bond would have become strong enough to ride the storm.