I think when Mukku escapes Aparna and comes to AN again, she will come with the locket. So her revelation that she is Moksh is extremely close. This time, I don't think Aparna will be able to follow her as she has already said she is willing to give Mukku up for adoption.
Now Kaka suspects foul play on the Deshmukhs side of kidnapping Moksh and keeping him away from Malhar for 5 years. And Kalyani coincidentally happened to adopted Moksh from Aparna. Kaka will prove somehow that all Deshmukhs colluded to keep Moksh away from Malhar, his legal guardian.