So my mothers cheated on my father multiple instances and he stuck by her side. Well he finally wised up and moved out. They are separated and he bought a new home. My dad is the nicest guy ever and I resent my mother. She never wanted kids. We never see her. She doesn't visit. She makes up excuses. Anyway.. her boyfriend moved in a week after my dad left and his kids are there! It's probably been around 6 months but today is my great grandmas bday party and my mother and her boyfriend (whom I don't care to meet) will be there. I'm torn. I want to go see my grandma but not my mother. Am I being petty? Should I just suck it up. My sisters met him and been around her more than I have and she lives 400 miles away! Any advice appreciated.🤢