My S/O has a 19 year old daughter that only calls him when she wants money or a ride somewhere. He admits that she is spoiled and manipulative and should set boundries with her regarding the money and rides, but he doesn't enforce his own rules. I finally told him that I was staying out of commenting on this behavior, that it is between the two of them. However, she does one thing that drives me nuts. She just walks into our house as she is "knocking" if the door isn't locked. If it is locked she will turn the knob and try to come in.