I had a unilateral mastectomy about a month ago and I suggest to have plenty pillows around to prop her arms on. I did recline with drains in place. Have her do all the exercises they suggest. This helps with soreness, drainage and swelling. Good luck to her and you. I hope this helps. There is also a website I have been visiting since my surgery that has given me a lot of and support during this time. You can chat with people going through the same thing that your are. It has helped me so much. Beyond the Shock is the name of it. It will help you also. Good luck in your journey through this difficult time.