Hi, Firefighter, and welcome to Psych Central! I am so sorry this lady won't leave you two alone. Can you document what she says and does that's the problem? Maybe if you do, then you can take your complaints to the higher ups where you work.
I am not familiar with Australian law, but I don't think a situation like this one would be within the interests of U.S. police.
I hope things will get better soon.