Kathy Hilton hosted a longevity day at her sprawling Bel-Air mansion on Tuesday. The Real Housewives of Beverly Hills star was joined by her sister Kyle Richards as well as Faye Resnick 'It's no secret I love entertaining at home,' Kathy told DailyMail.com She then said: 'Our backyard lends itself beautifully to this type of more informal entertaining. Kelly Osbourne …
