I would add in that I would remain calm and pleasant rather than confrontational about it, even if (or even more so) she got more angry and rude about it. The swearing is to try and provoke a reaction/escalate things, but if you don't meet fire with fire, it is likely to fizzle out.
'Where's my money?'
'Hmm?'
'Give me my money'
'Money?'
'My pocket money. Give it to me'.
'Oh. No.'
'What? Give me my money'
'I'm not doing pocket money now. We're going to do wages instead, where you have the freedom to earn money for certain things'
'Give me my money, you stupid bitch'
'Ah, no. That's not how you earn money. Maybe next week'.
'(rage, stomping, shouting, I hate you, I wish I was an orphan)'
'Okay. (Half an hour later) Dinner's ready'
'I DON'T WANT IT'
'Okay. It's in the kitchen when you get hungry'.
'I want my money'
'Oh, I'm sure you'll earn something by next week'
'(First polite thing said or helpful thing done all evening)'
'Yes, of course - thank you for that. I'll add it to the list of things you've done to earn money for next Friday. Oh, that was last week, we're on a new week now, so there's plenty of time to earn more'.