Is there something else going on here, possibly?
Because I can’t join the dots between getting anxious because she needs new shoes, and that anxiety being expressed in telling her parents to fuck off repeatedly.
Neither can I!
Re: the ASD, I have wondered whether she could be on the spectrum - my eldest DS is. Even so, that is NO excuse for the swearing and being rude to me. Neither of my elder DC have ever sworn at me ( apart from the legendary time DS1 put his middle finger up to me behind my back).
She wasn't having a good day before we left, which is why we took her out...DH needed to buy something specific, I went along to make sure he didn't choose an ugly one and we thought it would be better for DD to come along than watch TV all day. She'd been fine up until the shoe shop.
The issues she was having that morning were: her hair wouldn't style the way she wanted it to. DS1 has apparently told her he went back to Uni a few days early because she was annoying him ( I had no idea he'd told her this, I'm cross with him for saying it, and I need to talk to her about it.) It's not true. She adores her brother and misses him when he's not here, yes she does annoy him occasionally in the way that siblings do, but that's certainly not why he went back to uni earlier than she expected.
A boy in her class has been repeatedly mean to her about her hair and her shoes. Not wanting to drop feed: she has a bald patch where she pulled her hair out due to anxiety, which got particularly bad when she was being bullied at school. We are dealing with the hair pulling and have sought professional help. This thread isn't about that. The bullying has stopped.
She has a perfectly good pair of quality lace up school shoes. As she was walking along the corridor in school one of her shoes fell off (I've no idea how) and a few people laughed. She's told me this on Friday evening, but was in a very good mood and didn't seem upset about it. She must have been thinking about it though as she now she wants a pair of Doctor Martens to wear to school, but they will also be good for something she's doing in a couple of weeks time (I can't justify them for school, but I can for the other thing) Fake DMs are a fate worth than death, apparently.
I think that's how I'll approach it...you don't need them for school, but you do need them for X ( I'm not even 100% sure she allowed to wear them for school, but apparently other people do)
She been her usual delightful self today. She's asked very politely for new underwear, then laughed at what I brought home and told me in a nice jokey way, she hoped I'd kept the receipt as, apparently, I'm bad at choosing pants.