Take the emotion out of it. How would you treat an acquaintance or a friend? Don't mind read or put tone on an email, this will get you into trouble. Just answer whatever questions, and be direct.
My guess her email is her fear of dealing with any sorts of real issues with you. She is unprepared to deal with you and anything that would elicit an emotional response from you. Human nature is to only deal with easy things, and to avoid anything that causes discomfort. Don't take offense to it, just let it be what it is, and worry only about yourself.
M:39 W:37 Together: 16 years Married: 11 years Bomb: May '09 (ILYBNILWY) Moved out: Nov '09 D: 10, 8, 4