Jamie Lynn Spears and Casey Aldridge "Still Together"

Britney Spears' pregnant sister, Jamie Lynn Spears, 16, has not split from her 19-year-old boyfriend Casey Aldridge, despite reports from earlier this week suggesting otherwise, it has been claimed.

"It's completely false," a source close to the 'Zoey 101' star tells US Weekly magazine. "They are still together and he has not asked for a paternity test."

The cover story of In Touch Weekly claims Jamie Lynn was "dumped" and Aldridge is "convinced Jamie Lynn is lying" about the paternity.

Spears' Nickelodeon show, Zoey 101, received a huge ratings boost following the shock news of her pregnancy. The teen was recently seen studying for her GED.

Earlier in the week, Casey's so-called "doubts" were revealed by a pal of Jamie Lynn's troubled sister Britney Spears. "He [Casey] wants a paternity test," Britney allegedly told the Spears family friend, according to In Touch Weekly. "Casey doesn't want to be with her until he's sure that he's the father."

Rumors were also swirling that Jamie Lynn is in fact pregnant by an older TV producer. "Let's put it this way. They've both strayed a bit from their relationship. They're teenagers after all."