Hugs hun - sounds like a really tough situation!
I personally haven't met anyone like this woman but I'd be inclined to just withdraw from her. Maybe not the best way to handle it but that's just me. It would be better if you could somehow have a chat with her & explain how you feel if you're going to run into her regularly, could be quite awkward!
... yeh CM you hit it spot on, it's one of my concerns if i withdrawal then run into her in town then it's gonna be awkward for me (& even my DP) but then i thought if i explained it to her i still want nothing to do with her so it still will be awkward, infact i don't want it to turn into an arguement, etc which i feel if i do talk to her it could very well run the risk of a heated arguement ... and also i couldn't bring myself to dump that on her when she has two newborns and enough to worry about. DP said he think it's best to just try ' fizzle ' it out, like no more ringing or stretch the phone calls apart which i've already tried but she still rings.
It's just gonna be awkward either way i do it.
I think what i'm really hoping for is she no longer contacts me and gets bored with me or something or even use to me being absence or non interest in her (as she has made me not interested in her as a person now, to be honest DP & i have both said we both have 'always' found her rather boring, she lacks in contributing to an interesting conversation)!!