Hmm, well I have no experience with mother's, but are your mothers' in dirt or hydro? Plants need to constantly grow or they will die. So if she is root bound in soil then, try trimming the roots, putting in fresh soil and give a good watering. I have also read that some newer strains of mj have the problem of autoflowering and have difficulties vegging for long periods. Can you cut some clones off her to save the strain?