There are a lot of people with depression here. I'm one of them. Right now I'm not on medication (wish I were but the cost of what I was on was prohibitive even with insurance) so on the bad days I have to "play the game" as best I can because my family thinks I can just change my mind and be happy. Have the therapist explain it to your Mom. It makes it official and she has to understand that it is a very real problem and not one of laziness.