AITA for reacting to my aunts message that seemed controlling which escalated to her calling me my estranged dads name

A few days ago I was getting ready for work when my aunt rung and asked me to wake my mum up,

I did as my mum is quite bad with waking up, my mum was very annoyed at me and shouted a few times.

I received a message from my aunt

“Hi Jo, reminder that granny pays for your phone contract, and would appreciate if you used the phone for being in contact with people. I heard you and your mum awake and arguing as I’m outside”

Which made me feel like really weird, I wasn’t trying to ignore her I was waking my mum up and we also weren’t arguing, my mum was annoyed at being woken up as she had nothing planned today(my mum didn’t know my aunt was coming)

I responded bluntly saying

“I’m getting ready for my job,

I have let her know,

She’s not waking up, I’m not sure

what more I can do”

We start going in a back and forth and she makes a few odd comments like, don’t have a phone if it’s pointless or saying “

The only reason you responded was because I said that. Otherwise you would have just ignored me. Respond before I need to remind you next time.”

Which I felt was so controlling, my gran hasn’t said anything it’s my aunt using what my gran pays for against me.

I say my mum just needs a break, she goes

“a break👀”

I say

“What’s that supposed to mean”

She says

“Maybe if you stop bullying her that’ll help”

Which just fully took me aback, me and my mum are close, my dad left and it’s just me mum and my older brother

I said to her

“Bullying her?”

And she goes

“Alright Anthony.”

That’s the name of my father who left and is a horrible person, I’m shocked she would even say that and it furthers my belief that she just sees me and my brother as the result of a bad man and that me and my brother have ruined our mums life.

I’m unsure of what to do, I’m kinda waiting for an apology and my mum is going to speak to her I think but I’m unsure of how I can move forward