Brittni Colleps, a former Texas high school English teacher is currently on trial, accused of having sex with five male students.

Hard evidence against Colleps includes cell phone video that allegedly shows group sex between her and four students at her home. The graphic video was shown to the jury this week as the 28-year-old wife and mother of three stood trial.

While Prosecutors say it happened while her children and husband, who is an Army specialist stationed out-of-state, were away, one of the students testified to the happenings.

"She [Colleps] said that she craved, that I had something that she wanted," one of the students involved in the case testified.

According to reports, the alleged incident took place at Colleps Arlington, Texas home in April and May of 2011. While she is not facing statutory rape charges since all of the students were 18 at the time of the alleged incident, the former teacher is on trial for five counts of having an improper relationship with a student.

ABC News affiliate WFAA is reporting that one student was bragging about the alleged incident and another student put the claim in her diary. A separate teacher at the school reportedly found the diary in a classroom and that's when the school notified police.

The unidentified Kennendale High School students took the stand on Tuesday, saying his relationship began with an innocent text message. "Hey... It's Coach Colleps. Do you know what time the baseball game starts?"

In the testimony, the student went on to say that he and Colleps were exchanging almost 100 texts a day. The prosecutor says that the relationship progressed into explicit text messages and then an agreement to meet for sex, according to ABC News.

While the evidence against Colleps is quite damning, one of the young men she is accused of sleeping with has publicly stated that she didn't commit a crime.

In addition, Colleps' husband, Christopher, is sticking by his wife despite the accusations.

"If you know Brittni, you know she's an empathetic loving, loyal person. Brittni is a loving mother and continuously puts the needs of our children above her own," Christopher Colleps told reporters before the trial began.

The former Kennendale High School is out of work during the trial as the school district suspended her and decided to not renew her contract.

"She's terrified ... she has no idea whether she is going to prison next week or whether she will be home," her attorney said.

If Colleps is convicted, she could spend 20 years in prison.