Frankel spoke with E! News about her upcoming appearance on the new season of "The Real Housewives of Beverly Hills," and revealed that she used to be a nanny for the socialite sisters, carpool duty and all.
"I've known Kyle [Richards] for years," Frankel said of the actress. "I used to work for Kathy Hilton and take Paris and Nicky to school and so I knew them through Kyle, who's a friend of mine and she was coming into town so I got together with her in the Hamptons."
Richards has previously acknowledged her longtime friendship with Frankel, 44, posting a "flashback Friday" picture of the two "Real Housewives" stars posing together.