Zaikiya Duncan, 40, was arrested in Louisiana on Tuesday - hours after her twin teenagers escaped from the Texas house where they all lived and begged for help, detailing harrowing abuse.
Last May, at least two of her children appeared on camera to read Mother s Day messages to both Duncan and their nana as part of a series of videos she posted to Instagram depicting a happy family.
The severely malnourished teenage girl and boy have already told how they and their siblings had been starved, beaten, handcuffed, kept naked and forced to eat their own excrement.