Did Casey Aldridge Cheat on Jamie Lynn?

According to In Touch Magazine, Casey Aldridge, the fiance of Britney Spears' little sister, Jamie Lynn Spears, was cheating on his wife-to-be while she was pregnant, the LA Times reports.

Kelli Dawson, 28, claims that she and the then 16 year-old Casey were romantically involved. Dawson says that the two slept together while Jamie Lynn, now 17, was about six months pregnant. Almost a decade older than Aldridge, Dawson reveals her story, along with personal photos of she and Aldridge together, to In Touch.

Though Dawson claims that while she and Casey still see each other "at least once a week," they have stopped sleeping together. She also adds that they have not slept together since a few months before Casey's daughter, Maddie, was born on June 19 of this year. So why exactly did the then-underage Aldridge and Dawson end their reported affair?

"It just didn't feel right," Dawson explains to the magazine, which can be found on newsstands now.

Dawson says that the couple, who first met in 2006, "kissed randomly" in the beginning of their relationship, but she claims that they did not begin their sexual relationship until much later, in the spring of 2007.