Advice needed

My partner and I (23&24) just announced we are having our first baby. My mom is not happy for me in the slightest. She is very old school traditional and is appalled we are having a baby because we are not married or engaged (we have been together for 6 years) she hasn’t spoken to me since except for today where she messaged me “I need you to truthfully tell me of you planned this pregnancy”.

We did, but it’s none of her business.

I just don’t even know how to respond?? My partner’s parents are over the moon for us and I have enough support elsewhere to go without hers right now, but it still really hurts. All my friends are older than me and are married or engaged, one or two even pregnant and she’s so excited for them and have bought them tons of gifts and to have her so against me just feels really sucky.

How do I even respond to her message?