A math teacher and her teenage son have been arrested after a booze-fueled New Year's Eve party at her home, where minors drank alcohol, and one claims they were sexually assaulted.

Kristi Crawford, 46, a teacher at Wylie East High School in Texas, is charged with furnishing alcohol to minors, while her son Jacob Crawford, 17, faces charges of sexually assaulting a child.

The pair were arrested last Wednesday and released the following day after posting bail, Dallas News reports.

Kristi Crawford, 46, (left, in her mugshot) is charged with furnishing alcohol to minors, while her son Jacob Crawford, 17, (right, in his mugshot) faces charges of sexually assaulting a child

Police were alerted on January 9 by a minor that claimed she'd been assaulted at the New Year's Eve party at their home in Glendale Drive, Texas.

However, lawyers for the defense insist the sexual encounter was consensual and that Kristi never bought the alcohol for the teens.

Defense attorney Todd Shapiro said Kristi had bought the drink for a party for adults on New Year's Day.

Kristi, who teaches 10th grade algebra at Wylie East High School in Texas (pictured) has been placed on leave

He told the court that when Kristi had left her kids home alone on December 31, to go to her second job, her son had invited his friends over.

But the party quickly got out of hands, as his friends invited their friends over, and helped themselves to his mom's alcohol without her knowledge.

Shapiro also said that Jacob denied sexual assault and insisted that the interaction between himself and the alleged victim had been 'consensual'.

According to state law, a person who is impaired from drugs or alcohol cannot legally give consent.

'There is a very big other side of the story,' Shapiro said. 'Both of their lives are temporarily ruined based on unfounded allegations and a poor investigative job by Wylie police.'

Jacob Crawford (pictured) has denied sexual assault and insists the encounter was consensual

A Wylie Independent School District spokesman said that Crawford, who teaches 10th grade algebra, has been placed on paid leave pending the outcome of the criminal investigation.

'Because of the nature of the allegations, we immediate (sic) notified the Wylie Police Department,' they said.

'Our goals are to ensure that quality learning continues while maintaining the safety and security of our students, faculty and staff. We immediately placed the teacher on leave pending further investigation. The student will be disciplined in accordance with the student code of conduct. Because this is still an active case, Wylie ISD is not able to comment on other aspects.'