After reading the update for today's episode, I see the following happening. Sagar has now overheard Ganga and Rahul, and afterwards had a smile on his face when he came downstairs. I think now Sagar will go to Ganga and say that I know you still love me as it's obvious when you turned down Rahul. Hearing this, Ganga will be shocked/angry and will in fact tell Sagar that it's nothing like that and will go to Rahul and accept his proposal. This way, she ensures that Sagar gets married to Kaveri.
What do you guys think?