Here comes the latest rumor from camp Jamie Lynn Spears - a woman named Kelli Dawson has come forward to admit that she and Casey Aldridge (Jamie Lynn Spears’ baby daddy and fiance) had an affair.

This latest scoop is brought to you by InTouch Weekly - Kelli Dawson, 28, has talked with the gossip rag openly about her affair with Casey Aldridge, which started in November 2006 when they met at her sister’s house.

Casey Aldridge and Jamie Lynn Spears were dating at the time, but according to Kelli Dawson, that “didn’t stop their sexual chemistry.” “We were both really attracted to each other. He totally instigated it and pursued me. His friends would tell me that he liked me, and that he thought I was pretty.”

Things between Kelli Dawson and Casey Aldridge started with “kissed randomly” but progressed to “hot and heavy” in 2007.

And yes, Kelli Dawson even dishes on sex with Casey Aldridge, saying: “It happened very casually. He came by the house and I went off with him in his car and we had sex. Sometimes, we would go to his house or we would fool around in his truck, just driving around and then parking.”

The Kelli Dawson and Casey Aldridge affair supposedly ended months after Jamie Lynn Spears announced she was pregnant in December 2007. According to Kelli Dawson, she hasn’t slept with Casey Aldridge since March.

Casey Aldridge is the father of Jamie Lynn Spears’ baby, Maddie Briann Aldridge.

So, do you think Kelli Dawson is telling the truth about sleeping with Casey Aldridge?