First,
Tamil is in shock accepted.
But why isn't she thinking in positive way?wwhy to over react?
All is done now she is married.
She can atleat try to understand. Is second marriage wrong? Why should she try to kill herself?
Anyways she needs somebody for herself. After this situation she needs some courage to face the outside world. Why can't see accept Rahul.
If she thinks she is Sekar wife. Similarly for Rahul too it's like second marriage(standing for reception) only as there is already another girl in his heart(Nivedha)
So for both Rahul and Tamil it is second marriage only. So they can speak out and try to live happily. Even though that is not possible immediately. They can lead a happy life together.
Then regarding Tamil flashback.
My imagination:
There is a possibility that Tamil husband died with in few days of her marriage. And that they didn't even had spent their night together?
But what I want as flashback
Tamil life should have been happy with her husband. Then only it will have a equilibrium.
As Rahul had a good love life with Nivedha.
Why can't Tamil have good marriage life with Sekar.
Now let both Tamil and Rahul live happily forgetting both their past.