In January, David and Louise Turpin were arrested amid accusations of shackling and starving their children in the home.
The couple's youngest child, aged two, was believed to have not been abused or malnourished when she was rescued alongside her siblings.
In another one of her posts, the 17-year-old can be seen playing with one of the family's dogs in a filthy, cluttered hallway.
Another shows dirty smudges on a door.
ABC News reports that the teen also had a secret Instagram account, where she posted mostly selfies and photos of Justin Bieber.
A 17-year-old girl posted clips on YouTube under an alias before escaping to alert police. The victims weren't released from their chains to go to the bathroom, according to prosecutors. Authorities said the Turpin children, who range in age from 2 to 29, have suffered physical and cognitive impairments due to the years of neglect. David Turpin was also charged with one count of a lewd act on a child under the age of 14 by force, fear or duress.
The pair said that they had noticed Mrs Turpin's eye change in 1982 when they looked through old
The Riverside County District Attorney's Office charged both parents with 12 counts of torture and numerous additional counts of abuse and false imprisonment.
Their parents have pleaded not guilty to all charges, including the new ones.
Louise Anna Turpin appears in court for arraignment with attorneys on January 18, 2018 in Riverside, Calif. The parents, David and Louise Turpin, registered the home as a private school, which is how they kept the children from entering public school.
Meanwhile, the siblings are recovering physically and emotionally. While all 13 of those children continue on their road to recovery, a team at Corona Regional Medical Center says some of them are turning to music therapy to heal and learning to play guitar. The last song he uploaded on Youtube before the burst was titled "What's wrong with me", and his lyrics said, among other things: "And now what?"
The sister and cousin of the mother in the California "House of Horrors" case has visited her in prison - and they say she is "living in a la-la land".