Mom & StepDad Demands I Share Sentimental Heirlooms From Paternal Grandma To Stepsis Cos Family AITA

My parents are divorced. I (16f) lost my grandma from Covid in April. She left me her really cute and also delicate jewelry and all the jewelry she had gathered over the years including some nice necklaces, bracelets and rings (her engagement ring was there too but my dad kept that safe for me anyway because I think he was a little worried my mom would try to claim it). Anyway, when the stuff first made it into the house my stepsister (14f) took an interest in everything I had and wanted to look and touch and for me to share and I told her no. She was upset and said we need to share things and I told her not when it was sentimentally valuable and something my grandma left me. She told me we're sisters so I should share and I told her no, because she has nothing to do with my dad's side of the family.
Story 1:
AITA for hiding what I got left by my grandma from my stepsister?
Story 2:
AITA for reusing to invite my brother to my wedding.
Story 3:
AITA for erasing my brother
Story 4:
AITA for “flaunting” my marriage to my sister
Here a link to my Relationship Advice Channel: https://www.youtube.com/channel/UC30IScb7PwuUc-2fFacMG3w/
#AITA #Parenting #Family

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