Casey Aldridge (19) cheated on Jamie Lynn Spears (17) with Kelli Dawson (28) for 12 months, according to a report from In Touch Weekly. Now Kelli, pictured below, who looks like Jamie’s mom, is talking to the tabloids about her affair with Casey:

Dawson says she met 19 year-old Casey back in November 2006 at the home of her sister.

During that time Casey was already dating Jamie Lynn, but according to Dawson that didn’t stop their sexual chemistry. She tells In Touch Weekly, "We were both really attracted to each other. He totally instigated it and pursued me. His friends would tell me that he liked me, that he thought I was pretty."

Well, in order to protect herself, Dawson claims they saw each other a few times and “kissed randomly.” Adding that things got “hot and heavy” later on in the Spring of 2007.

And though Casey was still with Jamie Lynn at the time, Dawson says "You never knew if they were broken up or not, because it changed from day to day!"

Casey was even supposed to join Jamie Lynn on a trip to Los Angeles in July of last year.

Though Dawson says, “One morning, he called and asked me to meet him in town. I said, ’You’re supposed to be on a flight right now,’ and he said, ’I’m not going.’ He called Jamie Lynn and told her that she would have to go by herself. She was irate. I think she knew he was staying because of me."

Dawson and Casey were even sleeping together when Jamie Lynn announced she was pregnant!

Though according to Dawson, she and Casey stopped sleeping together a few months before Jamie Lynn gave birth to their daughter.

"It just didn’t feel right," says Dawson. "He had to deal with the baby coming, and it had to stop."

However, things apparently stopped between Dawson and Casey because she got back together with an ex last August. She says, “Casey was furious about that.”

Though she and Casey got back together before the year ended. Adding, "It happened very casually. He came by the house and I went off with him in his car and had sex. Sometimes, we would go to his house or we would fool around in his truck, just driving around and then parking."

According to Dawson the last time she slept with Casey was in March but "even after we stopped having sex, we would still kiss occasionally."

Even Britney Spears’s ex-husband is speaking about this. No, not K-Fed. Her first hubby, Jason Alexander.

Alexander says, “Kelli and Casey have been a couple on and off for a few years. They were a really tight couple, but I think it was hard for Kelli, having Jamie Lynn in the picture.”

Dawson adds about Casey that currently, "I see him all the time, at least once a week.”

This just adds fuel to the rumor that Casey isn’t really the father of Jamie Lynn’s baby. If she doesn’t dump him, it won’t be because she’s understanding, it will be because she doesn’t want the rumored older man who really got her pregnant to go to jail for statutory rape.

Kelli’s story needs to be investigated by police, since Casey was only 17 years-old at the time of their “sexual” relationship, which means she is guilty of statutory rape. Seems to be a lot of that going on in that town.

Adrian Grenier and Isabel Lucas three weeks ago, right after the accident that left Shia LaBeouf with a crushed hand. A source said:

"It wasn’t working out. Adrian saw her with Shia and that was kind of it, the crash, their hanging out. He obviously didn’t appreciate it."

Lucas was going home with Shia the night of the accident, even though she was dating Adrian. She’s a cheater. Only yesterday we saw Lucas with Shia again.

Balthazar Getty are no longer hiding their affair Sienna Miller. Balthazar and Sienna were caught shopping together in Malibu.

Getty’s wife was rumored to be willing to reconcile for the sake of their four children, however, unless she’s willing to accept Sienna as part of the family, then it’s a sure bet the Getty are headed for divorce.

Sienna Miller is still vacationing with Balthazar Getty, who is a married man with four children, in Positano, Italy. Shameless and disgusting.

Sienna Miller (26) was in Italy without her top on kissing Balthazar Getty (33), who is an oil heir, and married man with four children. Getty even has his wife’s name, Rosetta, tattooed on his left man breast. Rosetta just had the couple’s fourth child October 2, 2007. insider said:

“They were all over each other for the whole afternoon. They had no qualms about showing the world they were together There was lots of kissing and cuddling.”

This is why Sienna was nicknamed slutty. No morals, no values, and a home wrecker.