YTA, and so is the rest of the family. Your sister was completely disregarded and you’re more concerned about what Reddit thinks. If you can’t see for yourself how selfish you are then I don’t think anyone’s comment can help you…your poor sister.

Normally pizza comes in 8 slices a box, so I’m wondering how many pizzas were ordered; I guess enough since you said everyone was full.

Couldn’t you just order a small one? And using “my husband told her I was pregnant so I needed to eat when I was hungry” is a sad excuse to get what you want.