yeah Kaya may be the Surgon or the Whole BT thing is a false one planned by Prateek and Kaya to get Sam and Gauri. Or may be after Operation Samar forgets the Present and goes back to Past when he loved Kaya ..... forgets his marriage with Gauri, love for Gauri etc etc. Again starts thinking that Gauri is is Late Brothers Wife.
Or that mama is there for a NEW TWIST in the lives of Sam-Gauri, What if due to some misunderstanding created by mama Sam gets angry with Gauri and may slap her..... which her kids should see. Then he realises the TRUTH but the mama has tried to kill Gauri. Kids think its Samar who is trying to harm their mother. Gauri becomes a Vegetable who can't talk and move. Kids and may be Alok are thinking that the OLD Samar is back who wants to harm Gauri so they decide to leave the place and go somewhere Far faaar from Samar. Leap of 15 years with the kids grown up coming for vengence against Samar not knowing all this was done by Mama and other evils. May be Gauri may have a child of Samar .... if she has a girl then I wud like Tannu of Kahani Ghar Ghar ki to play Sam's child. Krishna of Kasam Se. Anyways lets see what happens in Future of KAA.