The lice would have been present before the girls arrived in the end of August. Did we not miss anything on the stuffed animals, perhaps something was overlooked on your end, again. Eggs don't just appear out of no where. I don't think I need to remind you that the poor thing arrived completely infested the last time. Just take accountability instead of redirecting it to others.
Lice - Myths and Facts about Head Lice - No, you don't need to clean all the toys. No, you shouldn't use mayo or tea tree oil. Yes, RID is dangerous to the health of your family. There are ways to get rid of lice NATURALLY!! Go here for great information.