Kim ... she is taking advantage of your friendship!!! You stood up for yourself, now DON"T BACK DOWN!!! If she is willing to lose a friendship over something like this, then she's not a real friend. Also, as a business person, she should know better. YOU, as a business person DO know better, and that's why you WILL NOT let her treat you this way any more! RIGHT???

Your work is worth every penny, and don't forget it!

Hugs,
Kim