Britney SpearsBritney Spears is reportedly considering making her mum, Lynne, the legal custodian of her two sons to prevent their father Kevin Federline getting custody of the boys.

Kevin pledged to fight for custody of 17 months old Sean and 5 month old Jayden when Britney specified she wanted full legal and physical custody when she filed for divorce last November. According to the Sun, his legal team have been closely watching Britney’s constant partying since then in order to portray her as a bad mother when the case comes to court.

Lynne Spears arrived in Los Angeles last week to supplement the care given to the boys by nannies. A source told the newspaper: “Britney has called in her mum to make sure nobody can accuse her of neglecting her children. She is terrified that Kevin will take them.”

In related news, an onlooker has revealed that Britney nearly broken down in tears on Friday when she thought she’d missed her flight to Los Angeles.

After leaving rehab, Britney was spotted running through Miami International Airport to catch a flight to Los Angeles but when she arrived at the gate, she found that the flight was closed and the walkway had already been retracted from the plane.

A passenger at the adjoining gate told People magazine: “She was really upset. She [said] to the ticket agent, ‘I’ve got to get on this plane to get home to my kids.’ She looked like she was about to cry.”

The agent then called through to the pilot, who let Britney board the American Airlines flight. Britney gave the ticket agent an autograph then smiled and waved at the onlookers, saying “God bless.”

An American Airlines spokesperson told the magazine that allowing late arrivals on board is not unusual as long as the flight isn’t delayed.

UPDATE: A spokesperson for Britney has told People magazine: “Britney Spears has voluntarily checked herself into an undisclosed rehab facility today. We ask that the media respect her privacy as well as those of her family and friends at this time.”

TMZ is reporting she’s admitted herself into an in-patient rehab facility in the Los Angeles area at the urging of her friends and family.