Why Jamie Lynn is ‘unbothered’ by sister Britney Spears’ latest IG attack?

Why Jamie Lynn is ‘unbothered’ by sister Britney Spears’ latest IG attack?Jamie Lynn Spears is reportedly unfazed by the latest attack launched against her by her sister, Britney Spears, on Instagram.On Monday, an insider spilled to Page Six that the 35-year-old actress “isn’t really…