Okay -
so I want you to ask yourself - what did this accomplish? For you?

I understand the temptation - you want the truth to be out there, you want to be vindicated.

But unless you expect to continue a close relationship with her family or friends (word of caution - blood almost always wins out) what exactly did this do for you besides letting you vent?

You've made her into your enemy - I'm hoping everything is already completely settled financially and legally with your divorce and she doesn't have any power to cause you trouble? Otherwise you just stirred up a big hornets nest.