Dannyalcatraz said:Lawyer here- don't do TOO much to the cat- it can get YOU in trouble for animal cruelty.
You could just take the cat and keep it in your house until you can give it to someone else who will be a more responsible owner.
*Ahem*
Mr. Lawyer, sir, that cat is owned by the woman, and the aggrieved person knows it. You cannot legally take it into your own custody under these conditions.
Unless the owner is clearly abusing the animal (and letting a cat out doesn't count) legally and permanently divesting her of the animal can be difficult.
If the cat isn't vaccinated for rabies, the animal control people can take it, yes. However, if she goes to animal control and finds they have it, typically they'll simply force her to get the beastie vaccinated and wear its tags, and give it back to her. Failing to vaccinate is not cause to permanently take the animal.