Heather Locklear still hates her former BFF Denise Richards so much that she fired her daughter Ava’s longtime nanny — because the woman refused to kick Denise’s kids out of a preschool she owns, sources say. The nanny, Robin Hasen, had been “like a second mom” to 9-year-old Ava, insiders say. But when Robin wouldn’t kowtow to Heather’s demand to boot Denise’s girls, Heather let her go.

“Denise and Heather’s ex-hubby Richie Sambora may have split up, but that doesn’t mean Heather’s ready to bury the hatchet,” said an insider.

Tags: Denise Richards, Heather Locklear

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