Would appreciate the input from any stepparents or parents here. For context, I'm an 18 yr old girl and have a new 39 yr old stepmum (parents been divorced since I was 5. both still get on really well as co-parents. no hatred or anything like that). My last stepmum (who I met when I was 6) was amazing, completely lovely - it was my mum that introduced her to my dad as she wanted him to be happy after the divorce. Still see ex-stepmum 2-3 times a week - she's my mum's best friend. Everything always was lovely.
However struggling to adapt to new stepmum (known her since I was 16 - they got married 2 months ago). She was perfectly polite when we first met and she has two daughters who are roughly the same age as me so thought this would work out well. I currently visit dad and stepmum every Tuesday after school and on Sunday afternoons. She made it clear to me that she didn't want to look after me and wasn't responsible for me - I never asked her to be. She's hostile and unfriendly to me and makes comments about me being inadequate to stepsisters. I never respond and am always polite to her. We had our first big argument on Tuesday
I was hungry (Dad was on a work call and stepsisters out) and decided to heat up some Garlic Bread in the Oven. She was watching TV and I asked her if she'd come and show me how to work it - it's different to mine. She immediately flipped and told me that she wasn't my mum, wasn't my servant and that if I spoke to her like that again then I wouldn't be able to come round anymore (they live in her house). I went home 20 minutes after that because she was furious
AIBU to feel disgusted by her attitude and should I mention it to mum? I certainly don't expect her to be my 'servant' and would appreciate it if she was at least kind and pleasant to me.