If Maya's obsession is proving too insurmountable for Samay, at some point, he might turn against maya & start blackmailing her! Maya might have no other option but to neutralize him! And, if by the time, Arjun has gone out of her control & drifted towards Saanjh & Sharmas, due to exposure of Ayaan's case and also her other tortures, she might plan to turn table against them! Either Saanjh or Arjun or both will get get trapped & charged for murdering Samay!
Both Saanjh & Arjun are having stakes, if 'Maya-Samay' link comes out in the open!It can be easily shown as motive for 'passion' killing as both are interested parties. Both can be charged with, but if Maya wants to save Arjun, Saanjh can alone be blamed & arrested!
Maya is clever enough to see it through, end to end!