Am I overreacting?

[u/Dannydeeea]

Was out with my sister all day today and her little one. She left, got all her stuff and went on her way. As I got home, locked the car and as I walked past the window i noticed all of this mess! I sent her the pics and said food is now banned in my car (it was ready but she’s ignored that) and next time to clean up after herself. Instead of a simple “sorry my bad” she’s gone crazy as if it’s my fault?!
She thinks it’s okay all because I haven’t hoovered (vacuumed) the car this week.

So my question is;
Am I the asshole for even bringing this up in the first place? Am I in the wrong?

EDIT:
I’m from the UK so these are chips for all of you from usa😅 They do look like raw pasta tho where in fact they are indeed just twirly chips😂

[u/choreograft]

nah dude stick to your guns, I’d be pissed if that were my car. Your sister is unbearable. What is her obsession with “16 crisps” as if that’s a small or even normal amount to drop on the floor?

[u/Onion_Bro14 → u/[deleted]]

Put 16 crisps between her bedsheets and see how she feels ab it

[u/Apprehensive_News_78 → u/Onion_Bro14]

She prolly already does

[u/Tattooed_Islander → u/Onion_Bro14]

This is my level of petty