SS said it has to look like Prats was killed in an accident outside the home. Krishna should never suspect them of wrongdoing.
Once Krishna leaves Kesar won't be able to clue him in on the plots against Prats. So it seems possible she will let slip a warning to him which leads to his decision to leave the Niwas for he can't watch Prats all the time. It's yet to be seen when she reveals all to Krishna.
This will also be when Komal will reveal the truth to Krishna after an attempt on her life has been made and she is either shown fighting for her life or had a narrow escape.
Ka kehti ho?