Bobbie Jean Carter, the sister of Aaronand Nick Carter, was under strict probation after pleading guilty to drug possession and petty theft in Florida nearly two months before her untimely death, RadarOnline.com has exclusively learned. Bobbie Jean’s mother, Jane Carter, 64, announced the 41-year-old’s tragic passing over the holiday weekend – marking her third child to die at an early age. “I am in shock from learning of the sudden death of my daughter, Bobbie Jean, and I will need time to process the terrible reality of this happening for the third time,” Jane said, referring to Aaron’s Nove…