its hard,... i'm not sure how much, if anywhere, you will get with email, as someone mentioned before her last response was very carefully "scriptured", she's on the defensive, she took your comments totally the wrong way, & no doubt will take this the same, & may just come back with more of the same, which will only add to your frustrations.

I do not think your going to get any more of her taking responsibilty "on email", it is better to do it face to face, or to call, there's no hiding behind words, but next week can feel like a hell of a long time away, & you shouldn't have to continue to feel like this until then, if you really want to send it, & totally understand, i would do too, then if it was me i would say at the end of the email, "can we discuss this before next week", phone or "crisis meeting" as such, you shouldnt have to sit on this until next week, ultimately you gotta do what feels right for you,

what's is your gut saying.....