Two important things happened.
First Nk came to know about Shyam's truth the other being his reaction to it.
The way NK reacted to revalation of shyam i mean not believing it and saying the same old saccharine things about Shyam how he can't be bad etc... Now the whole of the family will react this way only.
And poor Khushi will be put to test to prove it just the way she is doing now for Nk.