DEAR ABBY: Every summer, my husband and I, our two boys and my parents would take several vacations at Mom and Dad’s lake home. This is where Dad grew up and where we spent countless vacations as children. It holds much sentimental value to us all. We were lucky enough to have our own space upstairs and were free to enjoy the home as if it was ours. We always contributed to groceries and cleaning before we left, and it was very enjoyable for everyone. My mother passed away last year after a long battle with a debilitating disease. Dad ...