CL, Glad to hear that you enjoyed yourself at the reunion!
I'm sure you made the right decision; we all know our own families the best and instinctively know what is the best route to take.
In thinking on how to deal with your family, I wonder if it would be best to simply say "It takes two to ruin a marriage and we both take responsibility for what happened. We will put things back together jointly."
And leave it at that.
Because, after all, it is the truth. No one person is to blame for the downfall of a marriage and maybe they just need to be reminded of that. They don't have to know the specifics, however.
Just a thought for you..
Hope you join her soon and continue your good times!