I guess Rads will force Barkha to agree to marry Dev as she can't be RPain and thus the property will go to the trust.So Barkha will agree but Dev will not.But however he will sit for the wedding on convincing by Rads.I guess Rohan will get to know of this somehow and come in the mandap. Ro will be inside Dulha veil. Ro believes in snatching love so he will marry Barkha by dhoka. Then he will confess his love for Barkha and tell that Rads had no relation with him and then they will unite Radev.This will pave way for a track of Rubber ( Rohan-barkha)...where barkha will slowly fall for Ro...I guess the marriage sequences will be broad and elongated.
Dev said Mere brother ki dulhan(Radhika) is mine in these few months...now Rohan will say mere brother ki dulhan is mine (Barkha)...