A South Carolina student and his mother alleged that his teacher, who was arrested last December for engaging in sexual activity with the teen, coerced him into sexual relationship with her and lowered his grade when he refused.

Although Jennifer Olajire-Aro was the one charged with sexual battery, the lawsuit was filed against the Charleston County School District on Thursday, reported the New York Daily News.

The lawsuit alleged the school district has a "history of employees engaging in romantic relationships with students" and failed to properly supervise Olajire-Aro’s relationships with her students.

According to the suit, the Burke High School teacher had "conversations about sex" in her math class. Eventually Olajire-Aro coerced him into having sexual intercourse on multiple occasions on school grounds, in her vehicle and at her "primary residence,” the suit states.

The teacher allegedly encouraged the teen to have sex in the presence of her 10-month-old baby.

She pressured him to have sex by reminding him that "she alone controlled what grade he would receive" and she allegedly changed one of his grades from 98 to 89 when he refused her advances.

After receiving his final math grade for the term, the student told his mother about Olajire-Aro, and she told authorities.

Olajire-Aro was married at the time of her arrest and is the mother of at least one child, according to the Post and Courier newspaper.

"She is an awesome teacher but she is a hellacious person for what she did," the student's mother said at a hearing in December, according to the Post and Courier. "He is 17, 17. He is not an adult. ... Emotionally, he is not ready for this. I’m not ready for the texts, the phone calls, the comments."

Olajire-Aro remains a paid employee of the school district, according to the lawsuit.