I think she will change sides before that, but after she discovers that sindoora is the reason Rajeev died, Chandra will be even more angry at sindoora and will play even more bigger role in helping Divya(Vidya) from sindoora.
thats because I highly doubt that Amar will trust Divya about him being Sagar, so, Chandra will play sort of "bauji" role. She will help Divya.
Wat u guyzzzz think???