The stronger of the pair, Silvia took the brunt of Gertrude's fury; she called Silvia filthy (Gertrude's own house was a virmin-ridden hellhole), called her a whore (Gertrude had fucked another man during one of her three marriages (resulting in a child) and her own teenage daughter was a slut who was pregnant by a married man) and subjected the girls (and Silvia in particular) to physical, verbal, and sexual tortures that are nightmares to even conceive of.
Neighbors had noticed the battered state of the Likens girls, but they did not report Gertrude.
Gertrude tried to pin the crimes on her children and the neighborhood children when Silvia's hideously mangled body was found.
In other words, a demon bitch and a good reason for parents to do extensive background checks on caregivers before entrusting their loved ones to them.
Her eldest daughter and the rest of her children and the other children involved were also sentenced, but their punishments seem more like a slap on the wrist.
She could be compared to Lori Drew for Drew's cyberbullying of Megan Meier (leading the girl to suicide) for some perceived slight toward her own daughter.