This is a rush transcript from "On the Record ," July 2, 2008. This copy may not be in its final form and may be updated.

GRETA VAN SUSTEREN, FOX NEWS HOST: The showdown in court begins, Christie Brinkley on one side, soon to be ex-husband Peter Cook on the other. The new details in the divorce are nothing short of sizzling. Cook's grilled on the stand about his affair with an 18-year-old. And there is more. The other woman finally speaks.

Peter Cook had very little to say on his way into court.


UNIDENTIFIED FEMALE: Peter, how're you doing today?



UNIDENTIFIED MALE: Do you think you'll ever get married again?

UNIDENTIFIED MALE: Come on, guys. Keep moving. Keep moving.


COOK: I never thought I'd get divorced.


VAN SUSTEREN: On the other side of the battle, Christie Brinkley said this to reporters at the end of the day.


CHRISTIE BRINKLEY, MODEL: I heard a lot of new things that I didn't know, and so I really think I -- I'm not going to comment right now. I need some time to let it all absorb and...

UNIDENTIFIED MALE: It's been a really tough day, as well as a long day.


VAN SUSTEREN: Joining us live with the latest is FOX News's Jill Dobson. Jill, what got Christie Brinkley so upset? She must have expected most of this.

JILL DOBSON, FOX CORRESPONDENT: Yes, she must have, but you know, a lot of what Peter Cook said about cybersex and Internet porn really seemed to upset a lot of people. Even Peter Cook himself broke down sobbing when he talked about visiting different porn sites regularly and said that their 13-year-old -- their now 13-year-old son, Jack, actually came across some on-line porn as a result of Peter Cook visiting those porn sites on the children's computer.

Watch Greta's interview

VAN SUSTEREN: How much was he spending a month on these porn sites?

JACKSON: Well, he was spending a reported $3,600 a month on these different porn sites. And as Brinkley's lawyer pointed out, he wasn't helping paying the house payment, just spending his money on things like that.

VAN SUSTEREN: All right. Now, this -- this action in court is about what? They had a prenuptial agreement, so it can't be about money, or least unless he's trying to bust it.

DOBSON: Right. It's not about money. There is some real estate involved and some property. But really, it comes down to his character as they fight over custody of the two children, Jack, who's 13, and Sailor (ph), who's turned 10 today.

And on the stand today, we saw the other woman, Diana Bianchi, talking about having an affair with Cook when she was just 18 and he was 46. And judges Andrew Napolitano from FOX tells me judges don't like hearing all these lurid sexual details, but a custody hearing equals (ph) really a trial of your character, and that judge does take that into account when he's deciding where to place a 13-year-old and a 10-year-old.

VAN SUSTEREN: Jill, thank you.

Now, Peter Cook had a very close relationship in 2007 with a woman named Carri Lyn Ciamarra. Now, Ciamarra has been subpoenaed to testimony by scorned Christie Brinkley, but she does not want to testify. Joining us live in New York is Carri Lyn Ciamarra's lawyer, Anthony Mangone. Anthony, what are you going to do to try to keep your client off the witness stand? As I understand it, Christie Brinkley wants her to testify and slapped her with a subpoena.

ANTHONY MANGONE, ATTORNEY FOR COOK'S EX-GIRLFRIEND: Good evening, Greta. That's exactly correct. She was served with a subpoena earlier this week. We've taken steps to quash her testimony, which would ultimately preclude her from having to appear in court. We think it's rather unfortunate that Ms. Brinkley's appetite for revenge is being done so at the expense of my client and her family.

VAN SUSTEREN: Is it not fair, though, I mean, to -- I mean, if Christie Brinkley wants to say Peter Cook is unfit to be a custodial parent -- she's showed that he spends $3,600 a month on porn. That may be some element of it. He's got an affair with an 18-year-old during the marriage. Why not, if he's sort of a freewheeling type guy and freelancing in his relationship, why isn't that relevant to a judge's consideration as to whether he should get any or all custody?

MANGONE: Because it has nothing to do with my client. Quite honestly, Greta, my client at the time was legally separated from her husband. Mr. Cook was legally separated from Ms. Brinkley. They were involved in a relationship. The nature of that relationship is private, and I really don't see a need why you have to bring private citizens in to embarrass your husband and think about what the net effect will be to other people's families. And I think that's what the problem is right now.

VAN SUSTEREN: Has your client been interviewed or deposed or anything in connection with this Peter Cook-Christie Brinkley divorce?

MANGONE: No, that's a great point that you bring up. She has not been deposed. She has not been called as a third-party witness to any deposition. This is being done for the sensationalism. And to sit there and do this on the back of innocent people and put her in a position where she has to now explain what her relationship was as a private citizen is very unfortunate, and quite frankly, I think is unfortunate to her children, Ms. Brinkley's children.

I think that, you know, we're charged as lawyers with the responsibility of making sure that the best interests of the children are always kept in mind, and I can't imagine this circus atmosphere in any way is to the benefit of her children.

VAN SUSTEREN: All right. We only have 15 seconds left. I take it you'll have a hearing on your motion to have the subpoena lifted?

MANGONE: Yes, we do.

VAN SUSTEREN: When is that date?

MANGONE: That's scheduled for July 10, and we're hopeful that the judge will recognize that Ms. Ciamarra is not a necessary witness to this action and she's irrelevant.

VAN SUSTEREN: Anthony, thank you. Good luck, sir.

MANGONE: Thank you so much.

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