Anika and Shivaay doesn't hate each other as of now.They have a good amount respect for each other had.Now conspiracies are affecting but they have nothing like vengeance or anything serious in between.
But leaving how the marriage happen.
Will they accept the marriage or they just try to divorce I know its gross to think of it.
They don't hate each other.
Shivaays main barrier is class and khandaan in the marriage happened its already crossed so ot doesn't anymore matter to public or anyone .Marriage happened.barrier crossed .
Shivaay is like more aware of something between them,will he accept it or try to move away.
one more thing as Tej said divorces are not Oberois thing and no one took divorce.
Anika I am sure maximum resistance will come from her as now she is broken by Shivaay she will not be ready to trust Shivaay for life unless ofcorse he confesses which is not happening for another eon.So Anika here will be independent of her choice or daadi will make a dent and try to keep them together.
I guess their is yet confusion or we have to know how marriage happen which have effect on this answer.
so few possibilities.
1)Shivaay forces the marriage on Anika
2)accidental marriage less possible but havevto count.
3)dulha swap /groom swap
bride swap not happening I trust gul so not including in list.
But this part is really interesting how they progress.
I know for sure divorce won't happen ,I know of only one lead couple divorce that was when I used to wear nikkars to school.
Here just attempt is knowing our lead