Originally posted by: Sweet_Desires
If she is successful in throwing Thapki out of house then she will automatically be out of DS's sight too. That's her logic. I think Shradha thinks that Thapki is still after DS but actually it is the other way around.
And I don't thinkeven a 'free' Thapki, which is protrayed as being a sati savitri; would actually think of going back to DS until he is married. So Shradha's logic works here.