I think Bidaai is heading for a 2nd fiasco. After the Ambika fiasco, it will be Dadibua fiasco. The sob story that DB gave Ranvir & Ragini when she first met them is starting to sound like a nautanki now. I bet Vasu threw her out because DB may have tried to create a rift between Ambika & Vasu in past.
Who knows maybe DB had an illegimate son who she wanted to run the Rajvansh empire and thats why she wanted to break up the Rajvansh family.
Or, maybe the original DB got switched by her EVIL look-alike in the hospital by our one and only Ambika.
The above ideas are for the creatives who are hell bent on destroying this show