Leila's heart was filled with nothing but vengeance and hatred. For her, a loss was never acceptable. She never thought that she would lose her husband in her quest to get back her daughter.
Now that things have come down to this, she wasn't going to give up. On the contrary, the decision she made before became firmer.
Her husband was one of those people who did things to the extreme. When he loved, he gave his all. Similarly, if he hates a thing, he would hate it wholeheartedly.
After her actions against him, she was not hopeful about a reunion. She knew that once she walked away, there was no turning back for it.
Leila chose to blame Maimuna for this. if she had died silently and left this world, none of this would happen.
Mariam would be married to the Lord and she and Wahid would be the perfect couple they have always been.