Britney Spears' Sons Reunite With Jamie Lynn Spears' Daughters in Sweet Cousins Photo

All of the "lasts" have begun for Jamie Lynn Spears’ oldest daughter, Maddie, 17, who just began her senior year in high school. And she has her family standing proudly by her side. Maddie posted a series of images from her softball team's "senior night" on Instagram on Sept. 18. Among photos with her friends and family, one image stands out: a snap of Maddie and her younger sister Ivey with their older cousins Sean Preston, 19, and Jayden James, 18, Britney Spears' children with Kevin Federline. It was a...