I don't get any of it. I don't understand why you are so hung up on it. Really, I don't.
Didn't you have plans to spend the day with your own family and daughter? Why are you so hurt to not be invited to dinner? Is your sister also a mother? (or was the husband/son you referred to your other sister and her family).. Frankly, I'm a little selfish when it comes to days like Mother's Day (and I don't mind admitting it). I wouldn't want to spend it at my sister's house... I'd want to be spending it with MY family (my husband and kids). Yes... seeing my mother would be fabulous (she doesn't live locally), though I'd honestly not want to spend the entire day doing that. I love my mom. But I'm also a mom, and deserving of a little indulgence for ME. At mom's, I'm not the mom, but the daughter/sibling... so I am the one doing for mom, not getting pampered.
Sounds rather crass, I know, but it's honest.
Maybe it's bc we never had these huge Mother's Day deals when I was growing up. It was celebrated, but it wasn't one of those "invite the whole family" type events. It's was smaller and central to OUR home. We went and saw my grandmother, took her a bouquet of flowers or something, and that was that... back home. We didn't all gather at grandma's for the day/dinner.
It just seems to me that you are viewing this as you being excluded from something that is not what you think it as. It isn't necessarily an extended family all day event. It also isn't Christmas, when everyone needs to be gathered at the same time (for a lot of people, anyway). It's a day when you recognize and celebrate your mom.
You did that. So why are you so bothered that you weren't included in your sister's plans (your sister's, not you AND your sister's, plans). Your daughter and husband should be taking care of you and celebrating you a little. Did they not? Why the hurt feelings at all?
I guess I just am missing something.
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ETA
So that I am making sense: Instead of it being bowling and dinner, what if your sister was just sending flowers to your mom? Would you be offended and find it rude that she didn't call you and ask if you wanted "in" on contributing to sending them? And if you happened to talk to her and she mentioned she was sending flowers and then there was some awkwardness, and she asked if you would like to go in on that with her, the fact that it was last minute--would that bother you?
It's the same thing. She celebrated Mom not by sending flowers, though, but by bowling and dinner. She was not obligated to include anyone else in how she chose to celebrate your mom.
After your SWH: Who is "EVERYONE" else in the family? You only mention your two sisters and one of their spouses and son. That could simply be the host (and her family) and a single sister who has no one else to spend the time with. There is nothing rude about that, in my opinion. I had a grown brother who was single for a very long time. I never found it odd if he was included in anything, simply because he was single and had no other plans. Are there other people you didn't mention in this "everybody" else?
The bowling idea.. fine. But that didn't include dinner. So how that left you with no plans for dinner makes no sense.
I don't know. Sounds like you have other issues with your sister that predate this, maybe?
But, in answer to your actual question, no, I don't really find it rude. You obviously do, and you are entitled to think so. But I don't agree. And I am entitled to think what I think as well. You came here and asked. If you didn't want opinions that might be different from your own, you shouldn't have bothered asking for them.
You are upset because "we thought we had plans set for mother's day where my dd was included," yet the whole thing was "at the last minute." So, really, you didn't plan in advance yourself and you are putting the blame on your sister. That hardly seems fair.
I'm sorry you felt left out. But in my opinion, it was expectations on your part that caused it, more than any rudeness by your sister. Sorry you had a disappointing day. Next year, make your own plans from the start. If you want to include your sister, fine. If not, fine.