Dear Queenie,
My sister doesn’t listen to what you tell her and then she blames you for her mistakes and complains to our mother about it. When we make plans to do something she remembers it wrong and then blames me and tells our mother it was all my fault.
Any suggestions, Queenie?—Fed-up brother
Dear Brother,
Whenever you make plans with your sister, write it all down and e-mail her a copy, e-mail a copy to your mother, and keep a copy for yourself. Then you will have written proof of what the plans were and if your sister gets it wrong she will have only herself to blame.