Amy, I'm still of the opinion that this reads like it should be in a different novel. Your QL builds an agent up to expect dark angels fighting for the souls of innocent women. But you start with this. Unfortunately, this part isn't about bad angels. It's about an depressed woman in a failing marriage. This isn't where you should start your MS. It would be great in a story about a marriage-gone-bad, now-single-woman loses weight and gains confidence, finds man of her dreams, has another baby, and gets to tell her ex-husband, "Nyah nyah nyah nyah nyah!"
You need to start this with the angels or where the now-single woman meets the angels. Keep this part of the story in the background, as 'short' rememberances or excerpts. The agent, based on your query, is not looking to read about a marriage falling apart.