New here so please bare with me if I don't format this correctly. Also it's a long one. I 37 f have been off and on again with my ex. We share two children. He kind of comes and goes to visit sometimes and is a slightly absent parent. The kind that only takes the kids on some weekends when he feels like it. We don't have a set schedule. It's just me and the kids that live in our apartment and I work and pretty much do all the parenting. Teachers conference, choir practice, school drop off and pick up, cooking cleaning and everything that comes with parenting. He hasn't stepped up much in the parenting area and my kids are school age so they are independent, but still need help with things as kids usually do. Well, his parents contacted me asking if they could pick the children up, so that they can go to a family reunion this weekend. I said sure, because I love my kids seeing their grandparents and it gives me a small break as well. My ex lives with his parents. He works a good job, but he still stays there for I'm not sure what reason. Anyways, today he calls me and asks me that if he buys me a nice outfit if I'd go with him to the reunion. I politely decline because I'm off Saturday the day of his family reunion, but I work Sunday. I'm a massage therapist and it's a very active job so I wanted to take Saturday to rest my body and have some me time. He did not like that I said no. He started saying I'm an awful person and that I'm selfish. He went off on me about how horrible and careless I am and that I should be there to support him. I explained how tired I am and why, but he kept pretty much insulting me, so I told him maybe I wouldn't be so tired if I wasn't picking up all his slack as a parent and working a straining job. He went off on me even more. I feel like him dressing me up to take me to a family event when we aren't together, would put me in a awkward situation. We hardly get along as it is. So AITA for not going to support him?