#15 We hope their house gets termites
My father built the house I grew up in with minimal help. He spent two years working on it; the hardwood floors, the staircase, the bathrooms, he hung every cabinet by himself. Every piece of trim in the house was run through a lathe with his own two hands. He even did the spackling for all the ceilings and all of the paintwork.
Then my mom cheated on him for a year and bought him out of the house. Now my mom and step-dad have a pretty sweet place to live, and I can tell it hurts my dad whenever he has to go by to pick up my sister. He has to stand in the entryway of the house that he built and watch their fat dog scratch up the hardwood that he was so proud of.