i believe the shrieen is basicly a simple soul. deep down she knows that she is the one who is wrong. she knows that Rashid truly loves Dilshad and this keeps her insecure. she lives in her own dream world that everything is alright in her life. but she is not evil. her simpleness is what makes Razia control her so completely. and yes her curse on dilshad will back fire. becaues if you see it is her childrens life, future and happiness that is on the line.
ayaan is unhappy about his engagement with humiera.
Nikhat will face loades of problems if she marries Imraan. becaues he is spineless and her to be in laws are greedy leaches. or her engagment will break depending on the truth of Tanvir pregnancy comming out. Asad may be instrumental in breaking of the engagement. but it will be more for his sisters welfare rather than tanveers intrest. Asad is not the kind of person who would knowlingly let his sister marry a guy who has fathered another womans child.
as for ayaan. if he marries humiera he will be controled or try to be controled by Razia. living with Razia will be like a curse to him. he will never be able to love humiera truly. as he will only feel traped. as long as Razia's shadow looms Ayaans furuture seems very dark.
Asad is at the moment on the point of finding true happiness if he accepts his fate and marries Zoya who he loves. his happiness and unhappiness rests in his own hands. all he has to do is hold fast and accept his love for Zoya. they may face some hurdels due to Zoya connection with Gaffur siddique. but in the long run Asad and Zoya will have a happy life. probebly Asad may get his whole family, his father, choti ammi, brother and sister back due to Zoya.
but it is true that shrieens children rather than dishads that are staring at a unhappy feature