Asad and Zoya may fight, but they love each other too much to break up, and Ayaan is in love with humeira, and he must knows that Asad and Zoya are in love. he not going to go fall for the girl who is the love of his brothers life. and i doube that Tanveer will be able to break Asya up, they may forgive her, but they will never trust her again. the only trick that tanveer has up her sleeve is the identity of zoya's father.
and yes with tanveer back in the picture Najam's furture will be in danger. what with her preges with imrans child. so i just think she will be brought in to make trouble in all their lives
and as we know there has to be some drama when there is a wedding happpening