Can it be possible that Jai and Roshni were drunk and were driving. Since they were drunk, they got into an accident...and it Bani's mom got hit by the car...and broke her leg or something....but since she was diabetic, it got infected so badly, later on the doctor couldn't help her...and she died............and that's how Roshni knows that Bani's family has a history of diabetes.....
what you guys think..