Throwaway account. This happened this morning, and I’m so upset I don’t know what to do.

I (36M) have been with my fiancée (33F) for three years. I have a 10 year old daughter from my previous marriage. Her mother passed away when she was 2.5. My fiancée is currently pregnant.

Yesterday, my daughter asked me to buy a giant cupcake from a bakery near my work. She wanted to take it to school to surprise her friend for their birthday. I also bought an extra cupcake for my fiancée. She devoured hers right away.

My daughter was really excited and put a nice ribbon around the box before leaving it in the fridge to take to school in the morning. Apparently, my fiancée craved it in the middle of the night and ate the other cupcake.

This morning, my daughter woke up to a big disappointing surprise. She started crying and screaming. I asked my fiancée why she did that, and she said her craving was so bad she couldn’t sleep. Then she yelled, “It’s called being pregnant, jerks!”

My daughter screamed that she hates her and the baby already. I told her, “I’ll buy another one today and maybe drop it off so you can give it to your friend after school?” She said, “Don’t bother.”

Later, my fiancée texted me saying she’s upset that I didn’t stand up for her when my daughter was mean and that my daughter and I owe her an apology.

I’m sitting in my car wondering what the hell to do. Was I an asshole for not standing up for her? I feel lost