The uncle of Casey Aldridge, the father of Jamie Lynn Spears' baby, has said his nephew must accept responsibility for the shock pregnancy.

Jamie Lynn, the younger sister of Britney Spears, confirmed earlier this week that she is expecting her first child at the age of 16.

The teenager told OK! magazine that she was three months into her pregnancy and was shocked when doctors confirmed the news.

She added that the father of the child was her boyfriend Casey Aldridge and that she had waited for two weeks before informing her family.

The star of Nickelodeon's Zoey 101 also revealed that she was scared at the time and needed time to consider how to move forward.

But Odus Jackson, Aldridge's uncle, told People magazine his nephew has to grow up fast.

"I'd like to tell Casey that he may not like it, but it's time for him to put on the man shoes," he said from his office at the Galilee Baptist Church in Gloster, Mississippi.

"I don't want to get in their family business, and I don't think they want me in their family business, but there's going to be a baby involved, and [Casey] has responsibilities," he added.

Spears and Aldridge have been a couple for at least two years, Jackson said, but he refused to comment on whether the young parents-to-be should get married.

"There are a lot of things that are in the way [and] that will make it tough to last," he said.

A parenting book by the mother of Britney and Jamie Lynn has been delayed indefinitely, her publisher has confirmed earlier this week.

Lynne Spears was to publish Pop Culture Mom: A Real Story of Fame and Family in a Tabloid World on Mother's Day next year, but the book's release has been shelved in the wake of Jamie Lynn's pregnancy announcement earlier.

Lynne's elder daughter Britney is currently embroiled in a long-running dispute with her ex-husband Kevin Federline for the custody of their two children, Sean Preston and Jayden James.

The judge ruling in the case has previously criticised the Toxic singer for being a "habitual, frequent and continuous" user of alcohol and controlled substances and ordered to her to undergo regular drug tests and attend parenting sessions.

22/12/2007 18:47:23