I'm going to create a fake gmail pretending to be my wife's ex to give her some closure from a bad relationship
How do you intend to give your wife closure?
Small details that only he would know. She will get closure and we can be together
It is definitely wrong to mislead people like that. You should talk to her and help her find peace through truth and honest, not deceit. Otherwise she will not trust you anymore when she finds out.
I'm going to do it. I can't wait.
It is wrong to lie to your wife and mislead her. If she ever found out it could cause massive problems and trust issues.