I need to deagro, ugh.

hi guys, I'm back! if u haven't seen, my mom wanted me to pay for a car. basically it turned out it wasn't the totaled car she wanted me to pay some for but a new (to us), one! she didn't tell me that right away, but she did eventually so that's chill.

nowww, though, she wants me to give her half my paycheck for it for ten months! for the backstory for this chunk, after she and my dad picked out a different car, she said I'd have to put some in since I totaled the old one, completely fair. but she mentioned the payment plan for the car would either be 50/month or 100/month depending on my check. tonight we sat down again and she asked how much I usually get and I said 220 something usually and she said that'd id have to pay 100/month for it, and it's so aggravating idk.

I'm not against paying 1k for the car, but like I don't wanna give up HALF of my check for a car I don't even know if I'll half later on when I move out or something. there's one key for it now though and it's on my ring, but also whenever my sister gets her license we're supposed to share and if I'm putting some in idk if I wanna share with her yet tbh (a story for another time lol), but yeah.

i just wanna know what I should do? or if I'm just being petty and upset over nothing since it's money from my first job lol. like I said, I'm not against paying 1k at all, but half my check? idk.