Some random musings on the sibling dynamics:
Neil has brought up the fact he and Abhi aren't blood related quite a few times. In return, Abhi has responded with slight aggression (grabbing Neil's collar, speaking to Neil in a strict stern voice) with the intention of discouraging Neil from bringing forth this topic ever again. Blood relations don't mean much to him. It's the bonds that he makes that matter.
Although Arohi has never mentioned her and Akshara being step siblings in explicit words, she always alluded to it indirectly. We have seen her inflict emotional and verbal violence against Akshara (and though I sincerely hope it doesn't happen) she will most likely inflict mental and physical violence against Akshara too.
For now, bas itna hi. Have to head into work. Will probably add more later on.