I think you have a right to ask your W how everything is going and be honest with her. Tell her that because of her past infidelity, you have lingering doubts about her faithfulness. Don't tell her what you know about the guy. Just bring up your concern. It's the truth after all.
You'll never fully be able to trust her as it's still pretty early. 10 months is not enough to get over something like a PA. All the books and experts say 5 years minimum if even.
Bring up your concerns and learn to build up trust from there because if it's not with this guy, you'd be worried about her with someone else.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.