I HATE MY SIL!!!! She is the same are we related

Ok so I've had to do something like this DH's mother invited her to my baby shower I just sent her a fb message saying " look I know you've been asked to attend my baby shower but sorry you are not invited" and left it at that and she never rocked up short and sweet always works! I never had her mobile number as I CANNOT stand her!

So why not try " Look I know you have been asked to be a bridesmaid to my wedding but unfortunately you are no longer needed, thanks for you willingness to be my bridesmaid it means alot" Pretty much slaps her in the face but also has a nice twist at the end You could also add please feel free to wear the dress still though HAHAHAHA!!