Hi, I'm here to cause trouble

My mom and Karen just stopped by the house. I told her she wasn't welcome here and that my dad would call 911 if he ever sees her there, to which she said, "Oh, that's not a big deal." I don't hate her like I used to--distance calms feelings--but showing up here is disrespectful to my dad's and my wishes. Use a phone or the postal service, if you have something to deliver, (and she always sneakily calls it "something"--she never admits it's divorce papers). She just came to make him angry, anxious and stir up trouble, hopefully inciting him to physically push her off his property, then Karen would be the witness so they could use it against him in court and get more money out of him. After all the childish things she's put him through, just the thought of her gets my dad furious. When I told her she wasn't welcome and to drop off the paperwork at my sister's, she lingered on the porch steps carrying no papers in hand, saying useless chit-chat about internet technology and Karen's relationship. Normally, I'm a more forceful person, and if Karen wasn't there, I'd have been that way with my mother. I would have said, "You're not welcome here. Dad doesn't want you here. I don't want you here. It's disrespectful to everyone that you think you can just show up here, with that smile on your face, trying to ruin his night. Find something better to do with your time, because you can drop it off at Nicky's, where you know he visits several times a week, or mail it, and the fact that you know when he sees you here there will be police cars and you still linger is intolerable. Get back in your car, and don't come back." Then, I'd point at her car and hold my arm there, my jaw set. Something tells me she'll be back here, and the police cars will come, and the neighbors will peer out their windows at the flashing lights while yelling commences. Why can't my parents carry-out their divorce like normal people? Five years of this bullshit is a long time.