I don't know if I can explain well
Coz I myself watch qh very like very very often
So its like ahil is murdered and sanam sucides taking all the black powers of new sanam. Then happens the leap and mahira reincarnation of sanam enters new Sanam's house where she is known as khan begum (kb) now. So kb has two son and a daughter while her husband is a superstar I guess. The both sons I.e azaad and amaad hate each other because of a girl named afreen. Kb want her powers back and for that she wants a flower which azaad brings for her and after that the flower burns and leaves a sign from the ashes left. Later kb gets to know that the first baby of the girl having this sign and her son will be presented before shaitaan and then only she can get her powers back. The girl is none other then mahira. Azaad falls for mahira but as he feels himself dangerous for mahira he insults her and makes her leave the house. A heart broken mahira leaves but kb gets her back while amaad proposes mahira and she accepts because she was blackmailed by kb to do so. Kb then gets to know that the baby has to be from her first son and on the other hand Azaad on learning that amaad doesn't love mahira but is taking revenge from him by hurting mahira, he marries mahira while amaad marries afreen who was disguised as mahira. Afreen is also a witch who will reach its ultimate stage only after having a baby with kb's first son. Later afreen kills amaad and gets intimate with azaad. Kb somehow makes mahira believe her again. In meanwhile kb gets to know that her first son armaan is not dead but alive and the baby has to be armaan and mahira's. Mahira due to her efforts makes azaad a human being. While armaan makes an entry and says some bitter words to mahira. On learning that azaad is not kb first son afreen gets mad and tries to stab kb but azaad comes in between and he faints. While helping azaad, armaan also meets with an accident and looses his heart. Azaad donates his heart to armaan and thus azaad dies making mahira a widow. Leap happens and armaan is seen purchasing the kb's house but mahira comes to know that azaad died because he donated his heart and thus she feels armaan the cause of azaads death. She says that she won't leave this house at any cost and that too selling this house to armaan. They both hate each other. Afreen makes an entry again and poisons mahira. While mahira is unconscious afreen tries to get intimate with armaan but her efforts fails when she finds herself pregnant with azaads child. Armaan also find out that kb is her mother and she left him to die, he asks kb to leave. In meanwhile armaan falls for mahira and cares for her. then mahira falls from ambulance on armaan and when their heartbeat mingled mahira gains her conscious and misunderstood armaan again. Armaan who already love mahira apologizes to her many times and even expressed his desire to accept her for his whole life but she thinks this sudden change fishy and thinks that armaan is doing all this on purpose. Even armaan makes mahira 50% owner of the house. At this armaan throws a party.On the other hand kb gets engaged to ehsaan the partner cum brother of armaan and enters the kb house again. Armaan hates her and mahira comes and confronts him as to why he hates kb so much. He then reveals that she is his mother. Then for the first time mahira consoles him and feels his pain. Later mahira asks armaan to forgive kb and to everyone's surprise he does just because mahira said it.
Hope it helps...