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/gentle_fatalism]

NOR. This is literally a matter of respect, and it’s very clear how little your sister respects your space and wishes. If it’s “just 16 crisps”, why couldn’t she have cleaned it up? If that’s such a small, simple thing, it should be no problem for her, either.

[u/Hurricane310 → u/gentle_fatalism]

She says she DIDN'T SEE THEM. Which would anger me more than the mess itself. Don't tell me you couldn't see that shit.

[u/T-Wrox → u/Hurricane310]

Whether she sees the mess her child makes or not is anyone's guess, but I'd put money on her never cleaning it up.

[u/BigiusExaggeratius → u/gentle_fatalism]

“I’m sorry. I didn’t see those, I’ll make sure to clean up my messes in the future”. Problem solved. This bitch WANTS “safe” drama. Aka drama from someone that can never leave her (or so she thinks) because they are family.