If you see her staring you are (understandably!) looking at her.
Is there a possibility that she thinks you're the one "giving her evils" and happened to say to her friend "that's her, she keeps giving me black looks" and then - having let that out and being with her friend shouted at you? Just wondering why she is shouting now, as it's months on.
I don't mean to side with her - she shouldn't have touched a married man. But as a PP said, chances are your H fed her all kinds of shit about you.
The problem remains him, at the core. What he did.
I'd stare at your car too, if I couldn't avoid seeing you drive past all the time. Remember she may have loved him. And you've won. And are always around, and driving past.
If your H is worth it - I doubt he is, because whilst some marriages can be saved I believe the majority of cheating dicks are fundamentally worthless - then I'd even consider moving away. Crap to be chased out - but if I was in rented and didn't like the area much anyway... depends on your circumstances really. I've never lived anywhere where you drive past the same people all the time. I'd happily move away from that!
I'm really sorry you have this now too. But it doesn't sound like a campaign of harrassment, but a one off shout, and she's no more to blame for living near than you are.
Start a diary immediately of when she's there (in case you begin to see it's deliberate) and take any further action like shouting to the community police.
Don't engage.
And do yes counselling to point out to your cunt of a H that this is the ongoing shit he has put you through.