FORT WORTH (CBSDFW.COM) – An 18-year-old woman has been arrested in Fort Worth and charged with injury to a child.

Fort Worth Police said Britney Wiley, the baby’s aunt, admitted to shaking the 4-month-old, to try to get it to “quiet down.”

Britney Wiley

Wiley is the sister of the infant’s father, police said.

The baby is in the hospital having suffered a brain injury.