A Case of Identity

I think it's analogous, though not the same, to Mycroft's position; they're both convinced it's not safe to relax and let anyone through. And she probably thinks her inner self is impossible to love. Given the way she's written in Pink, you've pretty much got carte blanche about that inner self, but this piece suggests Anne had a natural curiosity which, outside work, Anthea has largely suppressed behind a wall of indifference. Perhaps she needs to become curious about whether she could have made things work with Sarah.