Assuming all you said is true, you will be doing more harm then good
If she ever be send to someone else home one day, they could do background check on her like you did and eventually find out too before getting married.
Its just not only you two crazy people
By making everyone aware of her behavior, you are not only disgracing her but yourself too. Her female cousins/sisters, if she has any, whom i assume got nothing to do with her behavior, will also be affected and stigmatized too.
At least have some self respect and not involved people who got nothing to do with it