What i felt, Aunt believes in destiny more than the hearts. It may be because of her own fate. So i try to think in this way: the aunt's real prob is that Aarti is a window and she feels that Aarti is an unfortunate girl. She is worried, whether her unluck affects Yash also... If so, i think, she will be ok when she comes to know that her husband is still alive and Aarti is not such an unlucky girl as she thought.
Yash's mom problem is she is a little bit proud about the family. She is pride that they are rich, and big prestigeous family. And Arti is an ordinary girl from a middle class family. She values the class of the family more. She preferred widow to divorcee is just for avoiding the other liabilities. She never wants to share their family standard to anybdy. And that is the reason she hesitates to accept ansh. If so, what if the story is like this.. Aarti belongs to a richer big family to whom Sindia family also respects?!! And once they went to propose Arti for Yash but by then Arti married Prasath against the wish of her family and thus they disowned her? Ha ha ha… maza ayega.. hai na? it is just for thinking….