Oh Tonya what a dilemma this has turned out to be. From what you posted, I would definitely question if this is really the woman's cat or not.
Is there any way you can find out for sure if this is really her cat?
I don't blame you either for being upset.
Do you think that it was possible that someone else found the cat before you and put the flea collar on her cause of the fleas.
I'm just grasping at straws here to try and make headway of the truth.