The 27-year-old beauty - who was sensationally sacked as a judge on the US version of 'x factor' last week after just four audition recordings - does now want the music mogul to be the "puppet master" behind her career and is keen to work on her own terms and not become the new Sinitta, Simon's ex-girlfriend who assists him on the TV talent show.
According to The Sun newspaper, Cheryl's mother Joan told a friend: "She was terrified Simon had become her puppet master and she was being turned into his new Sinitta - Simon's little pet.
"She is determined to carve out a career without him. He'll have to come up with something special for them to even speak again.
"Simon made Cheryl a UK superstar. She became the nation's sweetheart. But after he dumped her in the US, she decided to make a stand to show she's not a puppy."
Meanwhile, British 'X Factor' judge Louis Walsh has confirmed Cheryl plans to reunite with her Girls Aloud bandmates Kimberley Walsh, Sarah Harding, Nadine Coyle and Nicola Roberts for a tour in 2012.
He told BANG Showbiz: "I've been on the phone to Cheryl all day, honestly I can show you texts, she's fine. She's getting back with Girls Aloud in 2012 and they're going to tour."