Was Britney Spears sending a message? On Saturday, February 3, the pop star posted a silly photo of her and younger sister Jamie Lynn Spears from 2002. Despite appearing to be on speaking terms with her sibling — whom she has had a rocky relationship with due to her 13-year abusive conservatorship — Britney seemingly took a dig at her mother Lynne Spears by cropping her out of the image. “Throwback!!! I can’t stop laughing 😂😂😂 @jamielynnspears,” the “Toxic” singer wrote alongside the image, which showed the 68-year-old hands in the corner. The mother-daughter duo have had a strained relationsh…