I think your e-mail was excellent. You expressed yourself in a very concise well thought out manner. It was probably really good for you to be able to say those things to her.
Hugs
M 19 years, MC for 8 months, DB'd for 8 months 4 kids; 18, 15, 14, & 10 I was never meant to be a doormat. It took me years of therapy to become assertive enough to stop his abuse.