"She was never around me much 15 years ago at the time ... so why are they even talking about that unless she wants to sell a book at my expense ??? REALLY ??? Then where the lady mentioned why did she accused you of doing remixes to her songs ... I know it may sound like a silly thing to most people but I wrote a lot of my songs and my sister was the baby.
"She never had to work for anything. Everything was always given to her !!!! If you were me, you might understand asking for 13 years of remixes to go into a small venue show and on tours !!!! 13 years later they assign me as the MOTHER OF ALL ... (sic)"
The 'Lucky' singer - whose father Jamie Spears was recently removed as Britney's conservator after 13 years - then accused her family of "ruining [her] dreams" and always handing everything on a plate to Jamie.
She wrote: "Britney sitting there seeing a 15 minute performance of everything I have ever wanted.... But see, I always was the bigger person. They all got to DO IT and PLAY ME and I always sat there and took it. But see, now it's a joke ... the last thing I would ever do is ask for what was just given to her !!! So yes, they did ruin my dreams."
Britney then announced she was taking a break from Instagram, as she fumed how "disgusted" she is with her family.
She concluded: "I won't be doing Instagram for a while. The media, this business has always been extremely hateful to me.
"I've given enough ... MORE than enough. I was never given back ever what I want.
"My family ruined my dreams 100 billion percent and try to make me look like the crazy one while I have a 104 fever, not being able to move in my bed !!!! My family loves to pull me down and hurt me always so I am disgusted with them !!!! (sic)"
During her interview, Jamie alleged Britney once "locked them in a room with a knife", and that she was "scared" on a number of occasions.