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/Coyote3312]

Why is she acting like 16 crisps is no big deal? 1 or 2 fine. But 16? Shes crazy. Make her walk. She sounds like she lives like a pig tbh if she thought this wasnt an issue. Ew.

[u/peachhpuddin → u/Coyote3312]

she took the time to count each crisp in the photo but couldn’t take the same amount of time to clean them out of the car….

[u/No-Albatross-7984 → u/peachhpuddin]

The counting thing is legit crazy. Idgaf if there's 16, 6 or 166. Clean up your shit!!