If you use Aphogee 2 step, be sure to use a moisturizing condish immediately afterwards or you'll have SERIOUS problems. Don't use eggs at all....it'll be the dickens to wash out. Use Aphogee-moiturizing condish.
Given that her hair was/is matted, you might have to do it a few times over the next few weeks...1 wk in between treatments, IMHO.