I am still very confused...suhani is definitely the mystery kid...
and it can go either 2 ways...
1) suhani being adopted
2) suhani being real daughter of NR but clueless to ragini due to plotting of pam
I agree with you. It's probably the second way. Suhani might be NR's daughter but it might be unknown to Ragini (in today's episode, she mentioned only Ranbir and Aagam) and Pam plotted against NR using her so Suhani maybe the reason NR separated.