God this brings back memories!
i can laugh about it now but it wasn't funny at the time.
There was a family that lived above me years ago. We only got to know each other as she'd just had a baby and i'd help her carry the pram up etc
She went from 'god neighbour' to 'stalker'.
She'd listen out for what time i woke up, left the house, came back. i would get constant texts, phone calls, knocks on the door. I felt trapped in my own space and suffocated, she would drain my energy.
These people have either got some mental health issues going on or they just don't give a shit about taking bare faced advantage of someone.
My friends found it funny that i was being 'stalked by a woman' 
You have to make them go cold turkey. Block them on phone/fb etc.
Once they can only contact you physically - you keep it short and non-committal - never explain why you can't do x/y/z.
Don't answer the door even if they know you're in. My patience and tolerance for the 'i know you're in/why didn't you open the door' reached it's limit one day.
I opened the door and let her have it 
I no longer cared if she felt hurt or anyone thought i was being mean, fuck me but if they've got skin thick enough to behave like this then they can take on my wrath 
yeah she got the hump with me and bad mouthed me....but she could no longer behave like that again.
Your dh needs to get on board with this as well. It isn't funny and he shouldn't encourage her when she accosts him.
If she follows him he can very easily say 'we're about to eat' and then shut the door in her face if she won't go away.
As you have to live on the same road get used to doing the cheerful, smiley 'hi' as you pass them by without stopping to engage in any real conversation 