Article continues below advertisementJamie Lynn Spears is seemingly not happy with her former brother-in-law, Kevin Federline, after he exposed their private text messages in his new book. Spears, 34, reacted to Federline's memoir, You Thought You Knew, which hit bookshelves on Tuesday, October 21, by unfollowing him on social media only one day later, a news outlet reported on Wednesday, October 22. In addition, the former Nickelodeon star distanced herself online from Federline's wife, Victoria Prince, by also unfollowing her.