as we know from the new promo, for whatever reason Sidhi said yes to Abhey, but we also know she loves Kunal to core and only thinks for him and about him..
We still dont know much about Abhey's past or how and why Surekha landed up in jail..
Sooner or later Abhey will get to know or might sense that she does not have any feelings for him and might not even have any in the future...
so what if abhey turns negative to the extent of being a complete psycho obsessed lover .. he might try to get physical with Sidhi , or physically hurt her or torture her or black mail her ..
Sidhi being Sidhi will for sure wont be able to stand for herself and deal with the Diwaans and considering after the swap , it will be AC living with Sidhi and since he is exact replica of Sidhi , so he wont be able to do much either... abhey and surekha might take advantage of Sidhi vulnerability and her weakness her helplessness or the fact that she does not have a family to call her own or to look up to..
so once Kunal comes to know about Abhey hurting Sidhi , emotionally/physically etc , how will he react , or what will he do ?? will he finally admit that Sidhi is legally still his wife and because of his insecurity or fear of loosing Anand he will keep quite .. will Kunal the father overcome Kunal the husband or vice verse ...
p.s .. just for discussion ...