While I always think the "24-hour rule" is good policy, it sounds like you've waited 24 WEEKS. I'm glad you're finally standing up for yourself. Just make sure you are doing it out of love, and not out of anger and resentment.
Are you??
I discovered last May that my 47yo wife was having an affair with her 29yo personal trainer. I confronted her initially with "Is there someone else?", then confronted her with the evidence on May 26th. After a summer spent GALing, learning to lay down firm boundaries, and steadfastly "shining a path" back toward my marriage while never wavering from my "100% no-contact" insistence, she still refused to end it, and on July 18th I filed for divorce. My wife came to me on August 24th in tears, full of remorse, and begging to reconcile. We immediately instituted the no-contact/transparency plan, put the divorce on a "stay" and began trying to heal our marriage, which is where we are now.
She had one relapse with OM contact, came to me honestly about it, and we tightened up the transparency plan to make it more bullet-proof, and we are working on things. Our longer-term SSM problems are still there, and I'm going to have to make some decisions very soon about what my own personal integrity is on that issue, but the affair is long since dead and gone, the fog has lifted, and she is back home caring for our children.
