They will rehatch within 5 days causing all your efforts to again have been in vain. The 2nd retreat on day 4
kills all the eggs and
lice that the first one does not, before they have a chance to rehatch and start a new infestation.
I recommend retreating the home especially where she sits car seat, couch, recliner, play pen, carpet, mattress, etc. with a spray that is designed to kill lice. Ensure the areas have dried before anyone sits on the items.