Some people are just simply incredibly stupid.
I had a pickup speed up to pass me on the left last week only to cut RIGHT in front of me to turn into a right side road. I had to put on my brakse to avoid slamming into their side as they crossed in front of me. Totally clueless. But you know, i EXPECTED them to do that when they revved up as they passed me, then I heard them suddenly slow down- I then knew they were dumbas*ses and they might try to take a right in front of me....which they did. I was expecting it though, so I had my reaction time prepared ahead.
We just have to expect that some people are total lobotomies. Bike defensively.
Sorry you had to deal with Obnoxious Woman.