zoya asked asad ki" soch lijiye kyunki ab yeh nakli nahi hai (engagement)".i think asad has already done a fake engagement once so he agreed to do this btw this engagement is always real for asad ,only he shows as if it is fake.but before last break,he was telling that he will not do any nakli nikah.so he was totally against the fake marriage plan.thats what i understood.but yes they could make it more clearer by adding a scene where he gets ready to do engagement.