Arjun will find out about Shefali's reality and will feel so sad and guilty that he did not trust bhumi
Since Shefali has parental rights over the child she will threaten Arjun to um well marry her or else she will take away the child since Bhumi tore the ivf or whatever papers
Bhumi will handle the bussiness of the Parekhs and will be very successful and will meet the Goenkas in a meeting
She will find out about Arjun's to be marriage and be further depressed!!
She will feel that she has to take revenge from Shefali ( I am thinking she may or maynot think this way - because she is so sweet and nice!!)
Arjun will find out before his marriage about Bhumi being alive
He will meet Bhumi and both will make a plan to trap Shefali or since Bhumi is the mother he can get parental rights over the kid...... so he wont marry Shefali