It just seems odd that he would remember all that Sindoora has said to him Vidya not being right for him. The scenes they showed confused me. He remembers Vidya saying that why would she do something like that. He also remembers her crying that she is illiterate. They didn't show a single moment of Saagar and Vidya together. He then gets angry. This again I don't understand. When Sindoora asks implies to give Vidya a divorce, he asks her what she means. He sounds broken. After she states it, he looks completely and utterly shocked, and even when he takes the divorce papers his mind is elsewhere.
I don't think Saagar will sign the papers, unless he sees Vidya gone tomorrow.