I have a feeling Meera might get to know Rhea and aliya's true colours as she already had some mind voice regarding this when she found out Rhea framed prachi for stealing. By then Aliya might have gotten to know that pragya might be back. So in order to stop Meera from exposing, somehow Meera dies either accident or because of aliya and she somehow frames pragya for the murder making it hard for her to get into the mehra house. Rhea and the kohlis can hate her and Aliya can manipulate the kohlis as well. As obviously they know and are close to Meera than pragya