Sorry, LRD... are you talking about a transwoman, who fathered a child in the past...? So are you saying that she should or should not be called the child's mother now she is a woman? just a parent? has the child two mothers now?
I have a transwoman relative and I don't know what to tell my children to call her. I call her by her first name. But I have introduced other equivalents as "great aunt a" or "great uncle b".
She is still married to my aunt x. Should I introduce them as "great aunt x and great aunt y"?
You see this is where something weird comes into play. My aunt is my mother's sister and there is something so lovely about aunt-ship (in this case). She has me and my sister to stay when we were little and she was very young and had no children. We were her bridesmaids. She made things for us for every birthday. She has written me long lovely letters my whole life. She came a long way to see me when I had my first baby. To me, y is just the person in the house with her whom I was always shy of. At the time he was a man and he followed the pattern of uncles: sit around, women bring food, talk a lot, not show particular interest in the children, tease occasionally not necessarily nicely. I don't feel she (y) is my aunt at all and I don't feel like introducing her as my dd's great aunt. I am being cis-sexist I guess but this kinds of goes a bit deeper to me than just this particular relationship. I grew up with lots of aunts and uncles and loved some of them more than others, but there is a big difference in my head between and aunt role and an uncle role. My aunts stood with my mother, sometimes her literal and always her metaphorical sisters.
I should be ashamed of this gross prejudice, but I am not. This person hasn't earnt aunt-hood. Is this to say she hasn't earned woman hood? Very very dodgy. But maybe. She is a different kind of woman to me.