We had a falling out - please weigh in?

You did the right thing. You should never have to do anything like that if you're not comfortable with it. And remember anything in pictures or videos always has the potential to fall into the wrong hands, especially if you're uploading & sending out into cyberspace, and nothing is ever truly totally deleted. Why take the chance? If this person keeps trying to pressure you & can't accept that you just aren't comfortable, get out of this situation with her, she's got no respect for you & she's no good.