Finding the meaning

I stumbled upon this piece of street art in Newcastle, NSW. I’m struggling with the message, I’m aware that may make me stupid.

It appears as if the lady is talking messages of love to the dog, as it appears to be a speech bubble rather than a thought bubble. But her mouth is closed… So maybe the speech bubble is someone else’s graffiti added later on? Without it, she simply looks like a lazy cleaner, sweeping things under the curtain. This makes sense on its own.

But with the speech, I don’t know what message it conveys. Is she angry at the dog for making a mess and she is trying to teach the animal some human morals? Is it a thought bubble and although pretty mad at the dog, she is trying to remain a compassionate person?

Sadly, I haven’t been able to find info on this one, so we may have to resort to personal perspectives. What do you think?