A US high school teacher has been accused of having group sex with four teenagers while another student filmed them on a mobile phone.
Brittni Colleps, 28, is on trial for allegedly using text messages to pursue and then have sex with the five male students attending Kennedale High School in Texas, the Dallas Morning News reports.
The English teacher turned herself into police last year after a 19-year-old boy reported his alleged relationship with Colleps to authorities.
A student testified in court yesterday about text messages the pair exchanged and how the teacher had described herself as an "anything goes in sex kind of girl".
He said he had sex with Colleps five times and four of those times had other students present.
Members of the jury watched a video of four students having sex with a woman who is alleged to be Colleps.
The mother of three, whose husband is serving in the military, had been charged with five counts of improper relationship with students.
Her trial continues.