I don't think shes acting out at all. I'm quick to block people if they seem to be toxic as that appears to be the only working solution I've found to save me a headache and continuous boring obvious attempts at manipulation that I won't fall for, but I'm curious how people handle misunderstandings and other matters, or when they don't/can't block that person out. That'd require a new thread somewhere and I'd have to "watch" it with alerts.
In my experience if someone is toxic once they'll repeat that behaviour ad nauseam. I suppose people can forgive if its once out of a long period of time or there's some sort of other extenuating circumstances.
I'm of the mood that if someone acts out, not to stoop to their level and just block them/remove them from my life. If they can find a way to apologise then I can let it go but usually they're blocked before that happens.