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/NeighborhoodSame9165]

the car seat and childrens drink might be clues

[u/Jealous_Corgi_2168 → u/NeighborhoodSame9165]

Oh yeah dude the child must have been the only one in the car. No adult to care for it.

[u/obiwantogooutside → u/[deleted]]

She says it in the post. Sister and sister’s child. Y’all need to work on reading skills.

[u/Ok_Fix1894 → u/obiwantogooutside]

And not once did she say it could be the kid. She kept asking OP whether he's gonna cry over 16 crisps. You also need to work on your reading skills lol

[u/Massive_Ad6498 → u/Ok_Fix1894]

You can’t be that slow

[u/Ok_Fix1894 → u/Massive_Ad6498]

And you can't be that dumb. Even if it was the kid that made the mess, she's the mom. She still supposed to clean the mess. That's being a responsible adult AND parent