A second source revealed: "She doesn't like it when Sean prefers the nanny,
so she fires them and looks for a new one."

Meanwhile, Britney Spears has taken ecstasy and cocaine for years, her former sister-in-law has claimed.
Amanda Alexander - sister of Britney's first husband Jason Alexander, who was married to the pop superstar for just 55 hours in 2004 - says she has seen the 'Toxic' singer taking the drugs.
Amanda, who claims she witnessed Britney taking cocaine in their hometown of Kentwood, Louisiana, told In Touch Weekly magazine: "When I was around her, she took ecstasy."
Another acquaintance of Britney's from Kentwood, Kent Smith, said: "I've known Britney at least 10 years. We partied at Club 360 in New Orleans three years ago. She does like to party. I've been there when she's done ecstasy and cocaine."
Sources also allege Britney's drug use caused her split from husband Kevin Federline. Their marriage ended shortly after they were seen having a huge row on Halloween (31.10.06), the night his debut album was launched.
A source said: "Kevin was mad because he knew she was high on coke."
Kevin has now demanded an emergency custody hearing to decide who will get guardianship of the couple's two sons - 17-month-old Sean Preston and five-month-old Jayden James.