Jamie Lynn's Baby Daddy Cheated: Tabloid

Jamie Lynn Spears has bigger problems than being an unwed teen mom. Her college dropout fiancé, Casey Aldridge, had a “hot and heavy” affair through the end of the 17-year-old's second trimester, reports In Touch. "He totally instigated it and pursued me,” revealed 28-year-old Kelli Dawson, who said the relationship started in the spring of 2007.

Though they quashed the affair because “he had to deal with the baby coming," Dawson maintains that "even after we stopped having sex, we would still kiss occasionally.” And it's not a total blackout for the pair: “I see him all the time, at least once a week,” said Dawson. (More Jamie Lynn Spears stories.)