Is it rude if everyone gets a discount at your dinner table except you?

A few questions:

1. Is this rude?

2. What would you have done?

My bf’s sister invited us out to dinner along with her boyfriend and their other sister. She works at this restaurant and has been here for several years. Anyways, at the end…everyone got a discount except me. My bf was on my check… She said if I was on his bill they would’ve given me a discount. What difference does it make since he’s with me? Also, she told the waitress who should get discounts but I guess since the waitress realized I was the one paying/treating and not my bf I didn’t get one.

So everyone got a discount except me. Lol, I told my bf later that it was rude and he should’ve said something to her. He said he didn’t know what to do at the time.

It’s not like they knew we weren’t married or that they have some strict rule. just curious, no biggie!