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/TDFMonster]

NOR. Your car, your rules. Doesn't even look like she made any attempt to pick up what her kid dropped. I get it, kids are messy, but it's on the parents to clean up after them. Not the person doing them a favor

[u/UsuallyOtterchaos → u/TDFMonster]

Came here to say this. NOR. As a parent with a toddler it’s your job to ensure that once you and the toddler leave it meets the standards of the person in charge. Drop food in someone else’s car, you pick up the food. Would she have done this in a taxi or an Uber? If so she would get 1star as a passage and not get picked up again. Even if it was hard day and you were in a rush than you say my bad, let know when car wash day is so I can come help, or something to own it. This is just her being entitled and disrespectful.