Very Interesting topic GP.........
AS is not the BH.This is confirmed.
So,what came to mind when I was thinking about this was something goes like this :
Sriram Patil(Dutta's father) was a very admired & respected person in "Ratnagiri"(or may be the place they lived).AS & her family lived in the same village.I somehow see ,there must be some sort of friendship or connection between Dutta's father & AS hubby.May be he wasnot a good husband for AS.This might have not seen by Dutta's father & might have made AS & her daughters to stay with them(Dutta's father & Dutta) as AS would take care of Dutta as well as Dutta didnot had his mother.Dutta's father would have been a wealthy man & when AS' husband come to know about this,would have tried to get his wealth keeping AS into consideration.As his daughter's are there with AS in DUtta's father's house,he might have thought "If he kills Dutta's father & Dutta,he can get everything of their's".So,he might have killed Dutta's father.As he was not there,they(Dutta's family) would have lost all the wealth(or may be possible that AS's husband has eaten away all their wealth).AS would have come to know about his deeds.He might have even said to AS to kill Dutta for which she might have opposed & always worried for his well-being.AS's husband might have tried his best in killing Dutta but failed always.