I'm thinking of coming out as the other woman
Why do you want to reveal yourself as the other women?
The reasons are all about advancement which is my personal gain
It's good you're coming clean to all the infidelity, but it was unethical to begin with to start this relationship, already knowing they're taken.
Fool proof plan and advancement.
Cheating in a relationship is such a terrible thing to do. There are so many ways that this can negatively effect a person's life. It would be better to ask them for forgiveness and show how remorseful you are for your actions.