Filling out your profile would help put your questions in context. What is your MIL's impairment? Does she live with you? Has she always tended to throw pity parties or is this relatively new? Knowing a little more would help us respond more specifically.
True, the only way to look at answers to examples like yours r to see certain examples of her situations in life,Is she having "pity"parties 2 see if she can find solutions 2 her diagnosies,let everyone know she's in horrible shape etc.