Dear Annie: My father-in-law has been living with us for the past two years. He is emotionally stunted and acts like a 12-year-old boy. He spends his paychecks on ridiculous things like candy and stashes it all around his room. This wouldn’t be a problem if he made contributions in a monetary way. My wife and I had saved for a majority of our relationship to buy a house, and now we have the…