Our reader Amelia recently sent us a letter detailing her recent restaurant experience raises important questions about tipping etiquette, customer service, and how to navigate conflict.

Here’s her full story:

I (30F) went out to a nice restaurant with my husband (30M) last night to celebrate his big promotion. Everything was going well until the very end, when the waitress completely ruined it with her entitled attitude.

When the check came, I left a $10 tip on top of the $85 bill. As the waitress picked up the money, she sneered and said loudly, “Ten bucks? This isn’t the 1950s anymore, you know.”

I was stunned. Her tone was so condescending and rude. My husband’s eyes widened in disbelief.

“Excuse me?” I said, instantly annoyed. “I think 10 bucks on an $85 bill is more than fair.”