London, July 5 (IANS) Pop star Britney Spears’ sons are growing up and she is dreading to have a sex talk with them.

‘I’m dreading the moment when my sons ask me how babies are made,’ contactmusic.com quoted her as saying.

The 28-year-old has two sons – Sean Preston, 4, and three-year-old Jayden James – with her ex-husband Kevin Federline.

Spears, who has had numerous personal problems over the years, including a public break down in 2007, is terrified her kids would want to follow her footsteps into the entertainment business.

‘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 added.