Reply To: using correct pronouns

[Rebecca]

It might be that she regards your change of gender as little more than a joke, that it is of little importance to you. Or it might be that she genuinely hates – or is frightened by – the undermining of gender norms that you and we represent to her. Either way, you will probably have to speak to her privately again and explain that this is important, as it would be if you referred to her as they or he.

If this woman is a work colleague, it is a matter for your trade union to take up.