Almost 7 years ago now my fiancé and father of my 2 children passed away. I had to leave my job, who was mainly weekend work, to look after my 2 children because my sister wouldn’t look after them. She said it was because she wasn’t used to little children as she had none herself. For years I did everything with my kids alone. There were times like bday parties I did ask my sister to go with me just to keep me company as they can be boring sometimes but she always refused so I stopped asking and I have always done it myself. Well she now has a son in nursery who is getting party invites. She’s trying to guilt me into going with her to a bday party and has gone in a bit of a strop when I’ve said I’d rather not (tbh I wouldn’t mind but she always said no to me and always said it’s only a couple hours and that she hated being around noisy kids) Aibu to not go because she always refused to with me to a point where she’d just laugh and say no way I’m going just read on ur phone. I’m feeling like it’s petty but I just find it a bit annoying.