Well perhaps her behavior is her way of controlling her discomfort about her body. Possibly in seeking attention confirming that she is physically attractive helps her feel she has a sense of control.

I have learned a great deal in both reading and therapy how different individuals can behave in dysfunctional ways in order to gain a sense of control. My sister claims to have “special powers” so nothing you say to her is important as she knows all. She tends to embrace delusional thinking.

When another person has disordered thinking nothing you say can do much to change that. This doesn’t mean you are a bad person or don’t deserve respect. It’s very possible if not probable that a disordered person will not be able to listen to how others feel. All feelings are often more about them. This has been consistent in discussing different scenarios I have encountered with my therapist.