Irritating conversation with my mother of the day

Mom: What are you doing on Sunday May 24th?

Me: Not sure. What's up?

Mom: Cousin Vera's [my dad's second cousin -- i think...] daughter is getting married, and it's a family wedding, so the entire family was invited. I need to RSVP by tomorrow.

Me: Uh... um... [stalling] Let me get back to you tomorrow.

Mom: Why? If you have anything on that day, you need to change your plans to go to the wedding.

Me: I'll check back with you tomorrow.

Mom: Why wait until tomorrow? You'll just have to change whatever plans you made for that day.

**The End**

I NEED to change my plans?? Is my mother serious? There's absolutely nothing that my mom would deem appropriate enough for me to skip the wedding of someone I don't know? Not that I'm trying to be difficult and argumentative, but really. I don't know who Cousin Vera's daughter is. If she showed up at my door right now, I wouldn't have the foggiest idea of who she was. And she's a second cousin or something like that.

I mean, I get the whole family bonding/unity thing, but come on. One can't be expected to attend the wedding of each and every single extended family member. M (little sister) said that she's not going; I don't even need to ask H (big sister) about it to know that she's not going to go. It sounds heartless, but I'm not going without at least one partner in crime!

*Sigh*