You need to get out of there.It can only end badly.She will eventually get pissed that yr hubby isn't playing her game,& she will turn NASTY.She has intimidated/threatened you by implying she can be a bitch when she wants,she isn't allowing you free enjoyment of your home,& she's stalking.She knows FULL WELL you'll be hesitant to call her on anything because she's your landlord,so she's also abusing a position of power.Document EVERYTHING,because unfortunately you'll probably need it down the track.
Don't take it out on your man.Your Landcreature is a predatory bitch(on heat by the sounds of it!)-By what you say he doesn't know how to handle the unwanted attention,& feels really uncomfortable about it himself...Men tend to enjoy the attention at first,then it makes them squirm,but they don't know how to extricate themselves without offence. And they feel guilty about liking it in the first place,so get defensive when fronted on it!Poor silly ego-driven creatures that they are! lol.