Bellissima sorella ( beautiful sister)

Y/n is the baby sister of both Rosalyn (roz) and Jennifer Jareau. We're all 6 years apart. I was 6 when I found Rosalyn dead she's was only 17, JJ was 11 when she saw me crying. I pointed toward Rosalyn body . JJ took me away as she called the cops while our mother didn't care . Once JJ was 18 she's moved to dc . Y/n was now 18 captain of both her scoocr and cheer team . She just graduated high school. After roz sandy hasn't been the same and James sandy boyfriend of 3 years started abusing y/n since she was 16. Now y/n is 18 and she wanted to leave rosewoods and move to dc and be with JJ. y/n and JJ haven't talked in 6 years when JJ left home at the age 18 and y/n was 12 . 6 years later JJ 24 and y/n 18 . Y/n shows up at the bau looking for JJ . 6 years can change a person. What happened when JJ wonder why y/n is in dc and not in rosewoods.