Under their grandmother's care, "they could not be in better hands," Kathy Hilton tells PEOPLE

By Howard Breuer and Pearl Barraclough
November 19, 2009 05:25 PM
Credit: Mark Davis/Getty

Five months after their father’s death, Michael Jackson’s three children are thriving in their grandmother’s care, longtime family friend Kathy Hilton tells PEOPLE.

Paris, 11, Prince 12, and Blanket, 7 are “wonderful, their grandmother is incredible and … they could not be in better hands,” Hilton said Tuesday at the launch of daughter Paris‘s beauty line at the Thompson Hotel Rooftop in Beverly Hills.

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“I believe they are being home-schooled, which I think is appropriate for this year,” adds Hilton, 50, who has known the family since she was 13. “They’re getting along and they have an incredible family. They really are, I promise you.”