AITA for not calling my aunt and fixing our relationship?

Back story, my dad passed away and left behind minor children. 1 of them lived with a friend and my aunt helped them report their mom to social security for with holding their survivors benefits so they could have financial support. My aunt would call me and vent about things my dad had done, talk smack and plot on my stepmom. I had a pretty rough year besides my dad passing and was trying my best to grieve everything and everyone I lost. Well she called and was being very nasty and saying she wanted to take more from my estranged step mother than she already did by going after more things for my sibling. I told my aunt I disagreed with all of this because the woman still has minor children to care for who literally just lost their dad. She Lost it on me and said that this sibling was the only family she had left. This was a final straw for me because obviously I’m her family, my kids are, my minor siblings she was looking to uproot further are family and my other aunt is also her family. I have not spoken with her since and my sibling tells me that she is always guilt tripping them to get me to call. I just felt at the time I couldn’t be apart of her negative grieving process any longer and needed to grieve my own way with everything and everyone I lost. I still feel like inviting that back into my life would cause more harm than good even though I do somewhat miss having extended family and get together. I don’t think my kids deserve that ignorance either.