No tip for her
If you’re not sure whether a woman is pregnant or not, it’s better not to say anything, and even if you are sure, it’s still better not to say anything, since women can be sensitive to such comments. When this waitress asked her customer if she was eating for two, she didn’t find the joke to be funny, and she decided to say something.
She didn’t want to say anything to her face, however, so she left her a message on the bill, instead of the tip she was probably expecting. Would you act differently in such a situation? Some people would let it slide, but why let it slide when you can leave a passive-aggressive note?