The Multiple Personality Mother In Law

We have all heard the cliched mother in law stories.  Well my mother in law is the one they are all written about.  No, seriously.  So, in needing to get our most recent beach trip venting, off my chest, you are going to get the shortened history.  Starting with our first big encounter, up until this most recent encounter.
   My mother in law is not a happy person.  She is two sided, two faced, and unmedicated, ignore the diagnosis, bi-polar manic depressive.  We are all convinced.  She is stuck in a teenager's frame of mind, and will not ever grow up.  She has to be the life of the party, or else.  The or else always being to everyone else's detriment.  She is one of those people, who even picks on and makes fun of her own pre-school granddaughter(which has almost gotten her punched or disowned more than a couple times.)  She is an over the top drama queen who has a self awarded WebMD degree.  She is that woman who stays bff's with all of the son's ex wives, and with all of the ex boyfriends and girlfriends of her granddaughter, grandson, and the cousins.  She is the lady who likes to think she has to always be the boss, boss everyone around, or that everything always has to be her idea.  She freaks out and has an anxiety attack before every family function(she has no control over her sisters or parents lives), and does not do well in big crowds.  She does not know how to make friends, which is why she doesn't have any, and if she actually gets her relatives to like her, she alienates them all.  She is an alcoholic, which she still hides from her parents, and has a coronary if at age 59, there is a beer in her house in a picture, or god forbid there is her own beer in a picture.  She will harrass you until you delete it.  She actually cares what people think of her every move, more so than what she cares about how those around her feel.  She is one of those rare gems, who truly has no filter.  Whatever rude, crass, or downright mean things come to her mind, actually fly out of her mouth.  There is no thinking before speaking with this one.  Thank goodness I was raised a southern lady with manners, and the ability to bite my tongue most of the time.  Big huge family fights and divisions occur when I do and have opened my mouth.  So I try my damndest to just keep it shut, for the sake of my husband.  Who would not have a relationship at all with her, if I had not encouraged it, and convinced him to forgive her for his childhood.  What was I thinking? Eeee gads!