Around this time of the year, people are filled with the Christmas spirit, so they try to share happiness, warmth, and sympathy. However, not everyone deserves this type of nice treatment, just like this man's ex-wife.
OP shared his recent struggle with his ex-wife after she refused to follow their fifteen-year-old agreement. He explained that they got divorced some time ago and had a long battle for the house they lived in; he didn't want to give her the place because he inherited it and has been in his family for over three generations.
Yet, he decided to make an arrangement that worked for both parties: he would let her ex live there until their daughter turned eighteen. Her ex didn't pay rent, taxes, or maintenance, so naturally, she wasn't entitled to make modifications without OP's authorization.
This year, it was OP's daughter's 18 birthday, so he sent his ex-wife several notifications reminding her that she would have to leave soon. However, she never responded, and when he went to confront her, she didn't want to let him in because she had made a lot of renovations that he had never signed for.
OP was utterly shocked at how different the house was, and they started to argue. Finally, she asked for extra time, but he stated that she had to move out by the end of the week; otherwise, he would call the authorities.