When my dc were in their peak nagging phase, and I was seconds away from capitulating, I said “you can keep asking me but the answer will still no”. They stopped, shrugged and went off to do something else.
I have no idea how I said it, I think I was channelling my grandma or something in that moment because what I opened my mouth to say was “fine! fine! just do whatever you want”. I didn’t even think I sounded convincing, but it convinced them.
I only had to use that line on a couple more occasions and they started to realise that no meant no.
Which brought me to a different dilemma because now I had to think carefully before saying no. Sometimes we knee-jerk and we should be able to roll back if we have to. It’s much harder to do that if they haven’t experienced firm boundaries before though.
Is it really age inappropriate or are you maybe not keeping up? Things change faster than feels comfortable into the teen years and it’s just not effective to be the unreasonably restrictive parent. Boundaries are important of course but they should be reasonable too.
If you feel that this maybe is a situation you should in fact roll back on, create a fire break. Tell her that her behaviour is making you dig your heels in, and that if she was respectful and accepted your authority with good grace, you’d discuss it with her father. Then wait a few days (I’m still considering. Please don’t bring it up again) before delivering the verdict, But don’t do that unless you are going to change your mind. Just repeat “you can keep asking me but the answer will still no” calmly like a zen mantra.
The pets thing is a different issue. She’s 12. They’re not known at that age for their dedication and reliability. Give her chores that aren’t time sensitive, or add a relevant time consequence (no screens until the litter tray is emptied) and oversee it.