sticking my 2 cents in.
If you love her, try. Get over the affairs. There is an underlying reason for them and that's what you have to figure out. Let everything go. When you figure out what was "missing" which caused the affairs, then try to resolve those issues. The process of resolving the underlying issue will either bring you closer to your W or make it clear that you cannot work it out. Either way the As will be on the back burner for awhile and you will find that you are going to get past them one way or another. If your love and endure fixing the underlying problem, you may look back on the As as a horrible mistake which you know will never happen again.