Is my DD being rude or is this just a part of her autism?

[slavetolife]

My DD is 17 and on occasion when she is upset or frustrated with someone (mostly me, or her auntie), she will bombard with long text messages which I can only describe as like a stream of consciousness - obviously this seems incredibly rude when she does it, however I have learned that the best thing to do is to ignore it and wait for her to calm down - my sister however bites back and makes the situation worse.

Is this a "thing" with some autistic people? I'm struggling to manage the relationship with my siblings and DD as they just don't get it - I hardly do myself, she was only diagnosed 18 months ago! Generally my DD is quite well mannered except when this happens but it's almost like she is having some sort of meltdown at that moment.

Whether it is the product of her autism or not, she needs to stop the behaviour. So work on strategies with her. Never text while angry. Put the phone down, turn it off. Do something else (let her suggest options) to deal with her anger.

Whether it is the product of her autism or not, she needs to stop the behaviour this

I wouldn't like to be constantly sworn at and insulted by anyone, autism or not.

It must get quite wearing on the Aunt to be getting those messages over nothing but being told shes unreasonable for getting upset/angry!