She added 2+2 .. and equaled it (thankfully) to 4 and not 5.
She figured out, no matter how all the evidence stared glaringly at her, that Sonali's "Manav" and her husband were the same person.
She looked back at all the evidence and doubted Umaben's sudden "love" for her.
She managed to convince Manav and get him to meet Sonali with her.
He, in some way atleast, believed her which is why he agreed to meet Sonali.
He always finds ways to help her .. even if he has to do things he doesn't like.
Now all that's a first isn't it .. How many times have we seen a husband trust his wife over his mother? How many times have we seen the bahu pretty much figure out what her MIL is up to so soon? How many times have we seen a woman play masterstroke by masterstroke and almost effortlessly breeze past all the hurdles thrown in her way, and her husband stand by her at every step, helping her overcome her hurdles?
P.S. The icing on top of a great episode has got to be the fact that another flashback scene was enacted by Anuj as Manav! ;)