Stella (Hunter) Anderson, 56, 1300 block E. Perkins Ave., was charged with felonious assault, domestic violence and obstruction.
Officers learned of the alleged assault when Anderson took the boy to Firelands Regional Medical Center for treatment at about 10:30 a.m. today, Sandusky police detective Gary Wichman said.
The boy originally indicated it was Anderson who injured him, but later recanted that statement, Wichman said.
Anderson denied involvement, but a search of her home revealed bloody clothes and rags, Wichman said.
She allegedly stabbed the boy's right thigh with a kitchen knife, but his injuries did not appear life-threatening at this time, Wichman said.