Britney Spears is not looking forward to explaining the birds and bees to her boys.
She doesn't want her kids (with ex Kevin Federline) to become famous.
"If my sons told me they wanted to be in the entertainment business, I'd lock them in their rooms until they turned 30," she says.
Spears says her life has mellowed out since she famously shaved her head and entered rehab in 2007. She is still under the conservatorship of her father, Jamie.
"Things are pretty quiet right now," she says. "I've been spending a lot of time at home with my boys. They just started karate class, which is super cute!"
The singer -- who is dating her former agent Jason Trawick -- is pleased with her interview and the cover photo, which features her in her trademark low-cut jeans and showing off two tattoos on her pelvis. She Twittered Tuesday, "I'm on the cover of Cosmo's August issue. So excited! What do you all think?"