If life is all about living with whom there is no competition rather than with whom you WANTS to live, I dont really see the peace we are talking...if you think not having any villians in AD and Bani's life is going to keep Bani at peace, then I am sorry, i dont think so...There is always a thing called heart and many of us think with our heart...she will always love JW and living with AD will be something that is fake and I dont know how one will find peace in fake marriage...AD and Bani's marriage will be a comprises and the children AW and KW will constantly remind Bani of JW making it even more difficult for her.
A rich person sometimes marries a poor one cos she likes that person...even with all financial difficulties and other problems, they will find peace as they love each other and are content with their partners...
In life most of the times we have to think with her head, because whatever might stop in the world the need for food and water doesnot, heart doesnot help in that matter, and when it is more than one ppl involved its better to leave it as it is than to dig it and make it worse