According to some media reports, the Florida mother of a teenage boy allegedly involved in an affair with his teacher says she confronted the teacher about it as early as last year.

The South Florida Sun-Sentinel reported on Friday that in an affidavit, the mother says she confronted Lauderhill Middle School teacher Kristen Nicole Sullivan in 2009 when the teacher drove her son home from school.

The affidavit said, "She then asked Sullivan if she was involved in a relationship with her son. Sullivan responded by saying 'No' and claimed she was trying to be a mentor for her son."

The newspaper further said that Sullivan, 25, was arrested on Tuesday on charges of having sex with a minor. The 14-year-old boy said he and Sullivan had sex more than 100 times at school, at his home and in her car.

Sullivan has admitted to the affair but denied having sex with the student on campus, Police further added.

Authorities also informed that the affair continued even after the boy graduated from the middle school and Sullivan left to take another job with the school district.

The Sun-Sentinel further reported that the boy told police the last sexual encounter with Sullivan was Sunday night in her car outside his current home. (With Inputs from Agencies)