Wishing both Amy and Tammy well.
However, stop giving into Tammy and when she throws a fit let her! Walk away and stop doing for her. She doesn’t appreciate it as it is because she is used to people doing for her.
She needs to try for herself and get up out of that chair. The worst thing she did was come home from the Rehab when she was doing well. She was being made to do things and that’s apparently the reason she came home so others could do for her.