A 74-year-old female former private school teacher in Monroe County, Wisconsin, has been convicted and faces hundreds of years in prison after being charged with sexually abusing a 14-year-old male student.

Anne N. Nelson-Koch, 74, was convicted on all 25 counts Monday stemming from repeated sexual assaults on one of her 14-year-old male students, the Wisconsin State Journal reported.

Nelson-Koch, a teacher at a private school in Tomah, is said to have assaulted the teenage boy in the basement of the school several times during the 2016-2017 school year.

Nelson-Koch was 67 at the time and the boy was 14.