Сонсголыг хуваалцах

AITAH for telling my mom not to come to my graduation and just go to her my stepsister's instead? I (18f) have had issues with my mom ever since she married her husband Zeke when I was 10. Mom was a widow and I was her only child. Zeke was widowed and divorced with three kids. None from his late wife, one from a relationship before his second wife and two from his second wife. Zeke doesn't have a relationship with his son (his oldest). He shares custody of his other two kids. His daughter is my