My older sister unfortunately passed away in April, and her birthday is December 18th. We usually celebrate Christmas with her everytime she's here, and it's been that way up until she moved out. She doesn't really like Christmas, neither does my mom and neither do I. My mom and I realized it feels wrong to celebrate it without her around, but my grandma is ignoring it entirely and already has it planned out (she already has a tree up). My grandma was honestly not that nice with my older sister. There was a lot of fighting and bad things happening with her, but she's still her granddaughter. My mom's daughter. My older sister. You can't treat family like shit just because they caused stress. They're still family. I understand worse cases like abuse and whatnot but she wasn't abusive. She had mental illness (Bipolar/BPD) so things got out of hand a lot. My grandma would lock her out, disconnect her phone, yell at her when she came over (even if she does NOTHING wrong and is just sitting there calmly), do all this shit just to spite her especially when things got out of hand. So yeah, she and my grandma had a not too good relationship as my sister got older. I don't know if I'm a bad person for not wanting to celebrate Christmas since it feels wrong esp since it's a week after her birthday. My grandma is just ignoring the fact that my mom and I see it as wrong and a bit rude. What should I do? I feel like if I confront her she'll either not understand or just get mad at me and cause drama which she does a lot.