That's the thing about a can of worms. When they all start wriggling out you don't know which one to deal with first. You find yourself overwhelmed. Here are a few worms that come to mind and remember, each one has its own sub-set of worms.
1. Two divorces and the accoutrements of divorce- division of property, alimony, child support, housing- in a word your finances will be totally F'd up for a long time. Financial and legal problems have a cold shower effect on passion and passion is what is supposed to fuel this expedition into adultery.
2. The kids. Who lives with who. Don't be surprised if one of yours and/or hers decides they hate you and/or her and act out. The innocent parties won't just disappear, there'll be visitation and a certain amount of interaction that you will find to be a regular reminder of your decision and its consequences.
3. Her being a JW could be one of the biggest, nastiest worms of all. It sounds like you a have a vague plan for her to go ahead and get DF'd and then be contrite and get reinstated?? Are you serious?
I can clearly see you a short time down this ugly piece of road, lying in bed staring at the ceiling and wishing with all your being that you had never unzipped your pants and got out the can opener.