Only just only a possibility and my visions. So far we all kinda realized that HS didn't murder Imarti. I suppose it took place by his drunk father. Because when Imarti’s dad told that how much she takes care of HS drunk father. So HS dad, possibly made out something very inappropriate that makes her kill herself or HS dad was drunk and accidentally something happened. (As we all know) HS personality so he took the blame for himself not to sweep up /embarrassed his dad in front of the entire neighbors.
And this truth only Naeem Bi and probably Lala knows, because when Babita asked her, she said HS will tell & the same thing she said that to Beeji also, and when Imarti’s dad asked Naeem Bi to tell the truth in the court she said very strongly/confidently that HS didn't murder Imarti.
Ok friends just my thinking/imaginations that's all!!
Have a great weekend!!