LW2 might have a point somewhere in there, but she sounds like a loon and leaves all kinds of gaps in her letter. No specific examples of how her niece is "spoiled" or how her sister "treats her like dirt" or what she really wants her niece to do. She never actually says "I wish my sister would help take care of grandpa" in her letter. Odd that she dances around that without actually saying that. I generally don't tend to think well of someone who wants to "put someone in their place", which generally just means "I want to force someone to do what I want".