Yep, Yash is Abhi's son.. Saakshi overhears Yash and Kiran talking and hears him address her as mom.. She realizes she has been cheated upon badly and threatens to go and tell Simran the whole story..! On the way back, she is dazed and shocked and disturbed and hence unaware of her surroundings..She gets hit by a car and is taken to the hospital. Her last wish is to donate her eyes to Simran.. Hence Simran is operated upon and her eyesight is restored..Yash in the meantime is really disturbed over her death as he really does love her. He overhears Abhi and Kiran talking (Abhi comes over to Kiran's house as he has got to know that Yash and Kiran are in league) where Abhi tells her or rather reminds her of her past - about her "hooking" Abhi so to speak, about how selfish she was, how she used Abhi to make a career for herself, how she left him and went to Anil Shourie and so on..Yash realizes then and there that Kiran was the one who had deceived him all along - that she was the bad one and Siman the "good" one 😆. He surrenders himself to the police.. All this in a nutshell. Hope it helps. To get the details, please read Sree's wonderful updates which would give you the complete picture..:-)