Ana suffered second- and third-degree burns to her left ear, cheek, hand and shoulder and has required several skin grafts. Part of her left ear had to be amputated.
Mauldin, convicted of injury to a child, was sentenced yesterday to 25 years in prison and fined $10,000.
The mother, Eva Mauldin, had voluntarily relinquished her parental rights.
A custody hearing is scheduled for April 22. Child Protective Services is looking favorably on a planned adoption by Ana's foster parents, Heather and Jeremy Croxton of College Station.