At this point Gauri will do anything to get Kaali out her and Yug's way. She is obsessed with getting married to him and all he can do is talk about Kaali. She is vindictive enough that she may have deliberately or at least knowing chosen a criminal for Kaali - just to punish her.
I am not sure about Manji getting Yug and Kaali to realize their feelings because Yug already knows and Kaali is not going to budge from her stand of how Yug and Gauri should be together.