Thank you for your support, and I'm glad I could be of some help to your situation. And I am learning a lot.

Even though your sister may not be a primary psychopath, that doesn't mean she isn't struggling with compassion and empathy. It seems to me, from what you have described, that her upbringing had a big impact on her interpersonal relationships to the point where she does not feel safe or comfortable expressing compassion for other people, thus pushes them away. Of course, these are merely speculations based on the information you've given me, and I couldn't say that she most definitely is or isn't a psychopath.

The best to you and your sister.