Am I wrong for refusing to let my father and stepmom stay at my place after they treated me like a child at their anniversary party?
My dad and his wife have been married for 15 years and I'm pretty cordial with them. I'm 32 and I've lived on my own for almost a decade now, but sometimes they still act like I'm 16 and they're in charge of my life. They invited me to their big 15th anniversary party last weekend and I was planning on going, but then my dad called and asked if I could also bring over some of their old photo albums that I have. I said sure, no problem. Then my stepmom chimed in and basically demanded that I bring over a specific casserole dish that she really likes and also asked if I could pick up some of her medications from the pharmacy on my way because she "couldn't be bothered to make the trip herself." It was the tone more than the requests themselves, it felt like they were talking to a teenager again, not an adult.
I told them no. I said I'd bring the photo albums, but I wasn't going to be their personal errand runner for the party, especially since they had plenty of time to prepare and the pharmacy was right next to my house anyway. My dad got really upset and said I was being selfish and ungrateful, and that it was a small thing to ask for their anniversary. My stepmom then added that if I wasn't going to help out with the party preparations, maybe I shouldn't come at all. They've been sending me passive aggressive texts ever since. I was actually looking forward to seeing everyone, but after that phone call I don't want to go and be treated like I'm still under their roof and their rules. My brother thinks I'm overreacting and should have just done what they asked, but I feel like they were being really disrespectful of my time and my independence. Am I wrong for standing my ground?