I know it's hard to read tone, but I read the selling stuff exchange, as she got angry because mummy and daddy wouldn't do something, ( probably because they were tired of her bullshit) and she literally threw her toys out of the pram.
The mum response for me is akin to when your an angsty teen and to get back at your mum for not letting you get something, you then decide to bin your room ( because you can't have nice things) and your mum walks in and not rising to it just says put it all back when you have finished, dinner is a six.
Yes agreed. There's an element of "well screw you, Mum and Dad!" to all of this and I agree with previous posters that there may have been a big familial blow up around the time of the pregnancy, which in all honesty was probably her parents questioning whether she was ready to have a child but Jack RECALLS it as them saying soemthing like "You should have kept your legs shut!" a story which she has subsequently re-skinned for several different applications (Michael Portillo, women on train).
I'd also be interested to know when and how the name change factored into all of this. Suspect it was about the same time as said theoretical blow-up. I don't think it as to do with being trans - too early in the timeline. It was about creating a new identity but I don't understand exactly why.