Classroom Confidential: After Teacher-Student Sex Scandal, Can Marriage Survive?

Part 2: Brittani Colleps, husband Christopher speak exclusively to "20/20."
3:00 | 09/28/12

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Transcript for Classroom Confidential: After Teacher-Student Sex Scandal, Can Marriage Survive?
It's sentencing day in a ft. Worth, texas, courtroom and things are not going well for high school english teacher brittni colleps. We do not recommend community probati probation. She's slapped with a harsh sentence. Five years behind bars for having sex with five of her students and staging what prosecutors would call a sex toy filled orgy. Does it matter whether or not they were having sex toys and they had videotape going? That's not the thing that sentenced the trial but that is certainly relevant evidence that the jury got to hear about. Reporter: I recently met colleps in this ft. Worth jail. Now locked up she's never spoken about her case until sitting down exclusively with "20/20." Your kids are what ages. 8, 6 and 5. How did they react to the idea that you would possibly go to jail? You know, it was really hard. They started crying and, you know, saying, mommy, we don't want you to go to jail. When you think about where you are now, you're 28 years old, you have three children, you were a schoolteacher, how did you wind up in this mess? Sometimes people just hit rough patches in their lives, you know, personally, may be and I think that's what happened to me. I mean for that period of my life, I just disregarded everybody else and pushed everybody away from me. Your husband had no idea this had happened. Right. Reporter: Colleps joins a list of female teachers who went too far with students, some leaving families in shambles, others with husbands betrayed. I was mad. You know, I wanted -- I really just wanted to run away. Reporter:31-year-old christopher colleps would learn of his wife's deceit while serving as an army specialist in louisiana. To hear that she had slept with five of her students must have been tough. It was tough. It was -- it was the toughest thing I've ever had to hear. It was the toughest thing I've ever had to go through. And I'm still going through it. Reporter: And more devastating, the evidence of the infidelity. That graphic cell phone video of his wife in bed with four teenagers. Was that hard for you to watch. Yes, sir. When I took my vows and said my vows to brittni, till death do us part means till death do us part. Reporter: You saw that tape. Yes, I did. What did that do to you? It pissed me off. It made me mad. He was hurt and he has every right to feel that way. Reporter: Do you think what she did was wrong? I think it was wrong against me and our marriage but I don't see the crime outside of that. What if these boys have been 16 or 17? That's a different story because that's illegal no matter if they're students or not. The boys as everybody calls them in this situation are not boys. They're grown men. Reporter: Grown men, not minors, he points out as with some of the more infamous cases over the years. Just yesterday sarah jones, the bengals cheerleader and formal cheerleader accused of having sex with a 17-year-old student was released from 180 days' house arrest. Yes, he was a student but he was not my student. Reporter: Remember mary kay LeTOURNEAU. She served 7 1/2 years in prison for having a sexual relationship with a 13-year-old student even giving birth to two of his babies behind bars. I definitely knew that it was dishonest. And there was debra lafave arrested for having sex with a 14-year-old student. Her husband vowed to stand by his wife but would soon file for divorce. A lot of people don't know what unconditional love is. A lot of people don't know how to love unconditionally. That means without conditions and that's my love for brittni. Did you think about leaving? For a little bit. You think there was outrage over the fact that this involved multiple people. Yeah -- you looked like a sleaze this their mind. I think that had a lot to do with it. What happened with the clothes. They came off. Everybody's clothes. Yes, ma'am. Dirty details a husband is somehow now choosing to forget. I love her with every part of my heart, every ounce of my being. Reporter: At his wife's sentencing christopher openly wept begging for leniency for the sake of the couple's three children. We told them that mommy did some bad things and made some bad choices. I'm asking you to give her probation. So you don't think she should be punished at all. We ahen our children get old enough, she has to look them in the eye and tell them what she did. That is punishment. The young men that she had sex with, are you angry with them? I am angry, but me and god are working on that. Christopher colleps is determined to hold his family together. For now focusing on his children who must get through the next five years without their mother. When it comes down to it, you know, we still love each other and he's always going to be there for me no matter what. He said till death do us part means till death do us part. Yes, ma'am. I visit her once a day every day as long as they'll let me. That's as many visits as I can do a day. If they tell me I can go twice a day I'm go twice a day. There's reasons for everything even though we don't have any idea what those reasons are. Luckily I get visits so I get to see them so that's a good thing and just try to be as positive as I can. That's really all I can do. So where do you stand on this? Is it a debate at all? Thousands have already So please go to our website at abcnews.Com/2020 and join the fracas but then come back to me

This transcript has been automatically generated and may not be 100% accurate.

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