Kelly Osbourne has warned her father's alleged mistress not to "f**k" with her family.

Kelly Osbourne

Kelly Osbourne

The former 'Fashion Police' star tweeted the mobile number of Michelle Pugh, who she believes was sleeping with her father Ozzy Osbourne behind her mother Sharon's back and Kelly insisted it was her way of sending a message to the hairdresser.

She added to the New York Post's Page Six: "Don't f**k with my family, don't f**k with my momma, and don't f**k with me."

Michelle's number has been disconnected after Kelly tweeted: "Anyone looking for cheap chunky LOW-lights a blow out and a blowjob call *********** (sic)"

Meanwhile, Ozzy, 67, had allegedly been sleeping with his hairdresser for some time and Sharon even discovered he had been "supporting" the woman.

A source previously revealed: "Sharon found out about the affair by searching through Ozzy's emails. She was upset that he was supporting this woman!"

After she found out about her spouse's alleged infidelity, Kelly and Sharon bombarded Michelle's place of work, believed to be the posh Mêche Salon in Beverly Hills, with phone calls and subsequently had her fired.

The insider explained: "She and [daughter] Kelly both called the salon repeatedly for about two weeks before the news broke, trying to get in touch with Michelle. They were really angry. Sharon is the reason Michelle was let go."

Sharon confirmed she'd split from the 'Paranoid' hitmaker, whom she married in 1982, on her chat show 'The Talk' earlier this month as she thanked fans for their support.

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