Washington (CNN) Rudy Giuliani told an audience in Israel that he does not think first lady Melania Trump believes that President Donald Trump had an affair with Stormy Daniels.

"She believes her husband, and she knows it's untrue," Giuliani said at the "Globes" Capital Market conference in Tel Aviv.

The former GOP mayor of New York also attacked Daniels, an adult film actress who alleges she had an affair with Trump more than a decade ago, personally and denied that sex workers had credibility.

"Yes I respect porn stars. Don't you respect porn stars? Or do you think that porn stars desecrate women? Do you think that porn stars don't respect women?" Giuliani said. "And therefore sell their bodies. So yes, I respect all human beings. I even have to respect, you know, criminals. But I'm sorry I don't respect a porn star the way I respect a career woman or a woman of substance or a woman who has great respect for herself as a woman and as a person and isn't going to sell her body for sexual exploitation."

He added, "So Stormy, you want to bring a case, let me cross examine you. Because the business you're in entitles you to no degree of giving your credibility any weight. And secondly, explain to me how she could be damaged. I mean, she has no reputation. If you're going to sell your body for money, you just don't have a reputation. Maybe old-fashioned, I don't know."

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