I read somewhere that Alekh n Ranvir are step-brothers or something and there have been talks about a possible third sibling. So I wondered if the third sibling could be (an older?) brother to Inder/Satyan who was married to Vasu and Alekh is their son. It could be that he died and Dadaji asked/made Inderjeet marry Vasu.
But that's not all...
Inderjeet was probably in love with Ambika but Dadaji put his properties and business under Alekh's name or Vasu's care for which (and her looks) Inderjeet decided to marry her instead of Ambika. Ranvir is Inder and Vasu's son and Ambika, of course, married Satyan seeking revenge against Dadaji and keeping Alekh in this condition (please don't let it be her!). š
I don't think Satyan is innocent as well being the brother who never had any power. It could also be him who killed his dad or is responsible for Alekh's condition.
Anyway, I think this is the regret (marrying Vasu instead of Ambika) Inderjeet and Vasu were fighting over in the earlier episodes.
I just think this would better than telling us that Inderjeet or even Vasu had an affair (eewww!) and Ranvir is the result. But I hope I'm very wrong about Ambika at least. I don't want her to be a murderer.
Anyone else think like me or want to let me know that you think I'm crazy? I wouldn't mind. š