guys dekho am sure ki kallu will take a decision to keep pillu with mallu and avni.
ek tho woh mahaanta ki devi hai, upar se she might think ki pillu ithne saall takleefon se joonja hai so now needs a complete and happy family.
rather than keep shifting between families and seeing the mother in one house and father in another house with another lady. (agar avni tab tak rahi tho show mein) and roaming around courts in this age. that would break his heart and also affect him mentally.
she might say (dil pe pattar rakh ke) ki moksh ko kehna ki avni ki uski maa hai and he deserves a happy and complete family with bhai behen etc. as for i think.
jo ki mallu nay hone dega and he might tell kallu the truth about his and avni's marriage and that's when kallu may strive to claim her place of still being mallu's wife in somewhy, and going against kaka and avni.
agar ayisa kuch hua tho we will get to see kalma fighting together against all the world once again and will be fun..
but...yeh tab possible hai if kallu stop thinking selfishly and think about moksh's future. joki pata nay as we know her obsession with moksh and anupriya.