Mom and Femara

Hi Everyone: My Mom was DX'd with a reoccurance of breast cancer to the plueral lining of her lungs. It had been 12 years since her original DX where she had a lumpectomy and radiation. She is not HER2+ and is PR/ER+. Her Onc. is recomending that she take Femara, only. No other chemo. I am wondering if any of you out there have been on Femara, only. I don't know if the DR. is being aggressive enough, yet don't want the quality of my Mom's life to be seriously compromised if it isn't nessessary. Any info would be great! Thanks, Linda