Playboy Prince Harry sent a chauffeur driven limousine to pick up Catherine Ommanney, the star of the Real Housewives of D.C., so the pair could enjoy a series of steamy rendezvous.
That's the explosive secret being revealed by one of Ommanney's closest confidantes, the nanny who babysat the reality star's two children while she romped with the young British royal -- 13 years her junior.
"Although she was my boss, when she was really happy she would share things with me, like what happened with Prince Harry," former nanny Monica Herrero told RadarOnline.com in an exclusive interview.
"She would show me messages that he sent her, and she said that he wanted to take her hand and travel around the world."
Herrero was 20-years-old when she acted as a nanny for Ommanney and her two little girls, Ruby and Jade, in 2007, while they lived in London, England.
"While I was living with Catherine a car with a chauffeur came for her twice," Herrero said.
"Her daughters would tell me, 'This is the car that Prince Harry sends for mummy.'"
The single mother-of-two previously confessed details about her affair with the third in line to the throne, revealing he gave her "a long and lovely" kiss.
She said: "He was holding me off the floor, kissing me. I was absolutely speechless. I was against the wall, and he literally lifted me off the floor and gave me a lovely kiss which I was stunned by.
"It was a lovely kiss... Afterwards I didn't say anything. I was genuinely, completely blown away."
The ex-nanny said she took the job because she wanted to move from her native Spain to London so she could improve her English.
Herrero said Ommanney was separated from her husband, who lived in Menorca at the time, and although she had a boyfriend she would regularly brag about flirting and making out with other men, including the Prince.
"Catherine told me that one time that she kissed Prince Harry in a bathroom," Herrero said.
"She told me she met him because she doing interior design for him, even though I never saw her doing any work."
Herrero told RadarOnline.com she never thought much about Ommanney's rendezvous with Prince Harry because "she was my boss, not my friend."
Ommanney moved to the U.S. in the summer of 2008 when she married Charles Ommanney, a prize-winning photojournalist with Newsweek, after a brief romance.
The pair are currently going through a divorce.