AceShowbiz - Jamie Lynn Spears got candid in the first of a two-part interview on "Call Her Daddy" podcast on Monday, January 17. In addition to talking about her ongoing feud with sister Britney Spears, Jamie talked about the latter's famous split from Justin Timberlake in 2002.

"I think everyone thought it was forever," Jamie Lynn said. "I was so sad, first off, because my sister was so sad, but that, too, was the first time I saw maybe I didn't know everything about the relationship."

The "Zoey 101" alum went on to say, "Perhaps they were protecting me and obviously why would they talk to me about anything. It was really sad, though, seeing my sister be so heartbroken."

While Jamie Lynn said that she didn't really know why Justin and Britney broke up, she said that the former couple was "criminalized" and held to a "different standard" than other adults their age.

The "Things I Should've Said" author continued to share about her sister's feelings following the release of Justin's 2002 breakup single, "Cry Me a River", which many assumed to be about his relationship with the "...Baby One Time" singer.

"I thought, 'How heartbreaking it must have been for my sister when 'Cry Me a River' came out,' " Jamie reflected. "Don't get me wrong, like that's a way to launch your solo career, right? That's a way to do it, but I felt really sad."

The "Sweet Magnolias" star then addressed Britney's "Everytime", a slow ballad that the singer released the year after Justin's single. "And my sister she wrote that song 'Everytime' and she's beyond brilliant with anything creative and she picked that song out on the piano," she explained. "And she wrote it, and it still makes me cry because I think about how heartbroken she was, because that was her song and that was his song."