I think Vyom is the main culprit...his father and his nature is very obsessive. I feel like Vyom is manipulating his wife..if you notice Vyoms father is also very odd in his behr.
Vyoms was the obsessive lover in Sharus past and when she told his father..I think the father had shiv killed so Vyom and Sharu could be together
Vyoms father seems to go to any lengths for his sons happiness and I think it's cause Vyom has a psychiatric problems or disorder
I could be wrong cause I haven't watched the show continuously but I find Vyom very strange and obsessive...and his father seems to be covering for his son