Margrif is a 27-year-old former high school teacher who prosecutors say had sex with an eighth grade 16-year-old student, while in her car and at a store where the teen worked.
To avoid a trial, the Michigan woman pleaded no contest to three counts of second-degree criminal sexual conduct with a student. She is scheduled to be sentenced on May 20, 2006.
Margrif has never admitted she is guilty.