Every time my mother in law posts on my facebook page she ends with "Ly, Mom". This seriously pisses me off. She IS NOT my mother. I don't want people who don't know my family to think she is my mother. I only love the woman because I have to and even that is strained. But I don't want to hurt my husband by telling his mother to fuck off. She is a chronic pity-party-woe-is-me-pay-attention-to-me-because-I'm-dying-and-you'll-be-sorry-then hypochondriac hoarder who truthfully disgusts me. Any criticism at all will fuel her feel-sorry-for-me tank for weeks. I know it probably isn't worth addressing in the long run but it's totally disrespectful to my actual mother. So anyway, the point of my post is, how do you tell your mother in law to fuck off politely? Is there a polite way? Should I just deal with her and remember to pack extra wine for family gatherings? What would you do?