see thing is she doesn't really want to talk about it
She needs to talk about it. You both need to talk about it. I would do some serious research (and interviewing) and find a pro-marriage therapit with a specialty, a track record for assisting couples reconcile this kind of betrayal. And then tell her that you've made an an appointment and that you've decided that this is what the two of you will do; this is a non-negotiable requirement for reconciliation. imo
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac