AITA for not wanting to watch a puppy (meaning it’ll have to be crated) because after almost a year it’s still not potty trained?

I’ve been dog sitting my sister’s puppy a few times a week during the day, because i’m home and I already have a dog so why not. My problem is the “puppy” is now about to turn a year old and is still using the bathroom in the house constantly.

At this point i’ve basically told her she can leave the puppy at home in a crate if it’s not potty trained soon. Obviously it sucks for the puppy that it’d have to be alone a lot more but my dog NEVER has accidents so I don’t want to deal with a dog that is constantly having accidents all over my house.

The puppy also barks at everything (her and her boyfriend never take it on walks/training) so i’ve stopped taking it on walks/stores with my dog when it’s here, and I have to put my dogs favorite toys up because the puppy will destroy them. So honestly at this point i’m just fed up with having to deal with an untrained dog that isn’t even mine.