"Monday I came to my school early before...school [started], and I went to her classroom. And I walked straight to her, and I kissed her," Jimmy Pallais said. "When I stopped kissing her, I walked to my first class."
Jimmy Pallais said he then returned to Murray and asked her how she felt about the kiss.
"She told me, 'OK... I want you to kiss me again,' so that's when I kiss her again," Jimmy Pallais said.
Soon the relationship turned intimate. Jimmy Pallais said he and Murray had sex after school in Murry's classroom several times. On one occasion the two even checked into a nearby hotel. The tryst was confirmed by surveillance video showing Murray and Jimmy walking through the side door together.
The Secret Is Out
Jimmy Pallais and Murray's secret started to unravel when Jimmy's parents said they received a phone call from the principal, who told them that Jimmy had confided in another teacher that he had kissed Murray and the two had taken selfies showing them kissing. Jimmy had just turned 15.
Jenny Pallais said she also received a shocking text message from Murray intended for Jimmy. The message written partially in Spanish said, "You know I love you... I don't know what we're going to do, but we're going to be happy together... I'm worried about how obvious we are at school. I'm miss you."
Soon after, Jenny Pallais said her younger son Fernando, then 12, told her that he had walked in on Jimmy and Murray in bed together and saw her bra and condoms on the floor.
"Fernando came to me and says, 'Mom, I have something to tell you.'" Jenny Pallais said. "He says, 'She was here.' I said, 'What do you mean, she? Who is she?' He says, 'Kathryn Murray was here.' And I said 'What?' He says, 'Mom, they had sex.'"
Jenny Pallais said she quickly took everything she could from Jimmy's bedroom and called the police asking them to do DNA tests to prove Murray was in her own home.
"DNA from those sheets proved that she was there," Alex Pallais said.
The Teacher and Student Affair Finally Ends
The police interviewed both brothers and Jimmy eventually admitted to having sex with Murray. She was arrested and charged with sexual assault of a child, but was released on bail and was ordered to stay away from Jimmy Pallais.
As months went by, Jimmy's mother said he began opening up to her about his sexual relationship with Murray. Then he eventually told police.
"It's, like, you had the boy with all the dreams, and then you have a boy, thinking that his life is over," Jenny Pallais said. "This is not your life. We brought you here to be happy, to have a future."
With Jimmy Pallais' testimony and hours of surveillance video from the school showing Jimmy and Murry leaving her classroom together, prosecutors charged Murray with two more counts of sexual assault of a child and one count of an improper relationship with a student and ordered her to wear an ankle bracelet.
But in spite of all they had been through, Jimmy Pallais started secretly seeing Murray again.
"All the [feelings] that I have for her came back," he said.
His parents hired a private investigator to follow him, and one night Jimmy Pallais and Murray were caught together at her father's house. The police were called and Murray was arrested again.
Murray, her family, and her defense team declined repeated requests from "20/20" for comment. They cited her ongoing treatment for bipolar disorder.
Jimmy Pallais, who has since received psychiatric treatment, said he is doing better and admits he still loves Murray, but not in the same way as before. When asked whether he will see Murray again, he said, "Maybe."