Should I stick up for myself against my step-mother?

I’ve posted several questions here before about her.

But it’s getting really bad now. I heard her on the phone, actually heard her, calling me a “bitch” and a “spoiled little ass” to my dad. I told him I heard her and asked him if he was okay with her talking about me like that and he nodded “yes”. And then I heard her on the phone, “Was that (my name)? Oh, she’s not letting you get ready for work? I heard her voice.” And he told her that I heard what she said and she got really defensive like, “What?! How can she hear me through the phone?!!”

So he said we would have a family talk because he didn’t like the way she was acting. We never did. I keep reminding him and he acts like he doesn’t want to because what I have to say would hurt her feelings. Even though she hurts MY feelings all the time and he says nothing.

Yesterday I went downstairs to do my laundry and a load of her pajamas was still sitting in the washing machine. It was almost dry so I put it in the dryer.

Well apparently she never went down and got it and now it’s my fault that her clothes are wrinkly.

She wrote me a note saying that she was doing her laundry for work (it was pajamas) and I made her clothes wrinkly and now she can’t wear them and I should have waited until my designated time to do my laundry (apparently I’m only allowed to do my laundry on Sunday, but she’s allowed to do hers any day she feels like…even on my Sunday).
She also told me not to leave my clothes in the dryer and that she doesn’t want to see my clothes down there “anymore”.

However…I always bring my clothes up…and yet, I’ve taken out her clothes and folded them and brought them to her room SEVERAL times just recently.

So I wrote her a note in response telling her everything I just typed here and stapled it to hers and put it on the refrigerator.

I’m nervous she’s going to fly off the handle. Should I take it down? I’m tired of bending over for her like my dad does, I’m sick of it and I want to defend myself if my dad isn’t going to stick up for me.

Should I leave it up?