Munchausen's disease?

I suspect my 66 year old grandmother has munchausen's disease. She had many surgerys mostly elective. I have never known her to not be in "pain". She says the word owie about a million times a day. Recently my uncle had a hip replacement and now shes complaining of a hip problems. I had my braces tightened the other day and had a sore mouth, so she mopes around and says she needs to see a dentist because she has a sore mouth. Every little thing is wrong with her and she despitly seeks sympathy. She is about 5'2 and 200 pounds so severly overweight. She has type 2 diabetes which she does not need to have if she does diet and exercise, i explain it to her and she claims her doctor said she can't exercise because of her back condition. One time i was watching her fill buckets of water up under the kitchen sink and i was watching her do it about 5 or so buckets then i walked in and she claimed she couldnt do it cause her arm was sore. My aunt was recently diagnosed with cancer and she said she should be the one with it (im not knowing if she seeks the attention from the family or she rather have it as her mother) My aunt is complain of every-little thing but its understandable from her this is the only medical thing that was wrong with my aunt, but she drags down my aunt because my aunt will say i got a sore back , but my grandma will say to her i had a sore back for 30 years. There is many situations were i caught her exagerating her symptoms to doctors and im really worried she has munchousins Please help me diagnose her so i can tell her many docs what i suspect. Thanks a bunch!