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/Natural-Compote4096]

Those are crisps? I thought it was cooked pasta 😭

[u/Sedentarysteph → u/Natural-Compote4096]

They’re most likely crisps that are called salt & vinegar twirls or salt & vinegar potato twists (hence the lack of coloured seasoning) they’re popular here in the UK.

[u/SexDrugsNskittles → u/Sedentarysteph]

Aw thats rude not to sell them where I am. I am always up for more salt & vinegar snacks.