Jamie Lynn Spears stepped in to defend older sister Britney after an Instagram user made a comment about her mental health.Jamie Lynn, 29, initially re-shared a series of posts on Instagram about mental illness from celebrities including singer Halsey and former Glee star Kevin McHale.She wrote: “If you deal with mental illness, then you know how important it is to respect the situation with privacy for the person, and the family trying to protect their loved ones, no matter how it may appear to the public and as the public we must learn to do the same.“I pray this doesn’t bring shame to anyone dealing with mental illness, you are not alone and you are loved.