The end of the Spears-Federline marriage was due to Kevin calling time on the relationship Britney has revealed. Though it was Britney who filed for divorce in 2006 she says it was actually her husband who wanted out. The fallen pop princess has admitted that the marriage was a mistake but says her greatest sadness is for her sons. The 26-year-old told US Rolling Stone magazine, “To be a really good mom, I feel your child needs to be your full-time job. I want to raise my kids and share all of those precious moments with them. If Kevin hadn’t left, I’d be with my babies 24/7.”