Sonali, as Newbiesoapfan said, is a loose end. I can't understand her motives either, did she change his name because she realized he was married, or did she already know that and decided to create a rift? See right now, if we see things from Manav's perspective, you can't call him a dikra. All he;s seen is his mum making as many adjustments as CC, plus this whole Manav Nagar/Borisagar thing just added more to the confusion. And CC is not some silly naive girl, she's seeing through Uma's sugar coated barbs, only because she knows something is fishy. Uma has managed to alienate her from her husband, but this girl is a fighter, and she wont sit in a corner and shed tears .She'll go and look for more proof, and as they say in Hindi cinema- all criminals leave behind some proof of their crime. So, let the games begin!
P.S. I dont think she immersed the ashes, I think that empty pot is a hoax, and she's going to help Dadaji get closure. Thereby, becoming his darling.
If Sonali has any sense, even she will realise that she has lied to Chhanchhan and Manav about her fiance's name, so if Umaben does make her meet Manav again then Manav will also know she lied. Unless Umaben plans to make Manav agree to the rishta without even seeing Sonali ... possible, as he did agree the first time round to marry a girl of his mom's choice. But why would Sonali agree? She knows now who Manav is, and that he will recognise her.