I don't think you should think about showing her you have changed. You should focus on changing and making those changes long term. If she looks, she'll see, but only if the changes are genuine.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16