Kahani’s (aka Chuchum) father is the man in the wheelchair. Obviously Yug and Kahani’s father survived the car crash (as did Kahani). However, it appears that somehow Kahani ended up being orphaned. Whether she was not found at the crash site or if it was done on purpose by Baki Didi is yet to be discovered.
I believe Yug’s dad is also alive, just not living with them. His mom still wears sindoor and there was some mention between Yug and his mother that his father is alive, however Yug says for him, his father is dead. His hatred of “dancers” apparently stems from his father having an affair with one. This is also why he despises Chumchum. His brother seems to be following in his father’s footsteps the way he hellbent on getting Chumchum for himself.
Asfor Bedki Didi, sheis Yug’s future mother-in-law and his bhabi’s mom (his Bhabi and his fiancé are sisters).
I wonder if perhaps Yug and his father were perhaps just collateral damage in the crash or if Bedki Didi had some grievances with them and wanted to get rid of them as well.
Hope that clears some relationships up. It was very confusing for me as well but piecing the episodes together, that is what I have deduced :-)