The driver said that MK did change genuinely after meeting Meera but then when his business was going down the drains, he left the city and came back with money. He started avoiding Meera.
What if Meera was pregnant with the child of a blue-eyed man and in the rain she was begging MK to accept her and the baby because she was still his wife? She was begging him for something and the driver assumed it to be acceptance of her and their child, while it could actually be acceptance of her and her child with someone else.
MK felt betrayed by her and married Padhaji? And remember the driver DIDN'T LISTEN to the dialogues.
So if this is the twist then RishTan aren't brothers.😛