:grouphug: My mil calls dh at work, cause like yours...she knows who call to stir up worry, stress and the reaction she's looking for. Your mil is much older though, and in a perfect world she will get the evaluation and the appropriate services at a place other than your home.
(I understand supporting your dh, I mean this is his mom and he's concerned about her... And if he's anything like mine, can't or doesn't want to see what she's really like.)
(Who knew little old ladies could be so mean and manipulative?)