DEAR ABBY: I’m growing concerned for my grandparents. They are in their late 80s and homebound. Recently, a new tenant moved into their garage apartment. They LOVE her. The rest of the family is suspicious of her. She has no job and no car and has never paid rent. She frequently spends the day with my grandparents and recently “helped” them change all their usernames and passwords to something more “simple and easy.” My grandparents live on Social Security. They have no savings, and I don’t believe they have a will. From my perspective, they are setting themselves up to be robbed, abused and l…