I am not a regular viewer so I don't know.. Why is Sai not divorcing Virat? She is anyway ready to leave him for his happiness (or her mental peace). Why not make it official? Why this chori chori chupke chupke jaana ?
Is she scared that Aai would emotionally blackmail her to not break the relationship? That is possible.
But wouldn't Aai understand that Virat is downright abusive?
Rest of the chavan nivas would feel relieved that she left.