My take on future storyline

I think the story will progress like this... Sona now knows about Vicky and Elena. Elena will try to break up with Vicky but he will emotionally blackmail her and they might elope and get married. Everyone will be shocked and when they will come to know that Sona knew about this, they will put the whole blame on her.

Also on the other hand, Dev will come to know about Saurabh and Sona's business venture from an outsider which will put more cracks in their relationship. Any maybe then there will be an ugly confrontation between them in which they might spit out all their bitterness and story might lead towards separation and maybe then prenup thing comes in.

Breakup is good for them .Both need to learn a lot about marriage ,adjustments and need to learn how to trust each other with having to keep any secrets .Meanwhile Sona can help her family with business without having to hide from Dev or support her cousin without having the need to inform her husband . Dev can look after his family without upsetting his mom .When both are done with their responsibilities and have time for each other they can think of recoinciling else can go separate ways .