I am absolutely fuming about this but maybe I'm the AH and I need to just let it go...

To set the scene - I just arrived back from a long work trip Friday night. Sunday we are celebrating Easter with my husband's family and we were asked to bring a dessert. I enjoy baking when I get the chance so I asked my husband if he wanted a lemon blueberry cake? It seemed fitting for the occasion and delicious so he was excited about it and I was looking forward to trying a new recipe.

My kids had sports games that day so we went to watch and my FIL also joined. While he was there he mentioned that my SIL was also bringing a dessert. I was a little taken back and we asked if we should bring something else? (I was making the cake later that afternoon) FIL said no, bring what you were planning, they just wanted options. Fine.

After games and feeding the kids lunch I go buy all the supplies for the cake and bake all afternoon. Probably takes a total of 4 hrs. Again, I like doing this so it was okay, but I was tired from the trip and had other things I could be doing like, idk napping or hanging with my kids, catching up on chores, etc...

Later that night my husband and I were talking and I mentioned the dessert situation. I said something like "I don't think we need two desserts for 12 people" bc at this point I was assuming his whole family was coming. He says "No, it's just 8 of us" his BIL and family weren't joining.

I WAS FUCKING LIVID. you mean I made this entire cake + SIL is bringing another full dessert for just the 8 of us? Like I could have skipped all the work and just picked up a fruit tray instead. Again, I like baking and I wasn't that put out by the original ask bc I wanted to do something for the family. But something about my SIL making an additional dessert and us still being told to bring one really pisses me off.

So, AITAH for feeling snubbed by my in laws?