GingerJane,
I'm sorry that any of us have these types of people in our lives (in some form or the other). I pray that you will find it in your heart to forgive your DH for this mistake. Unforgiveness holds us back and eats at our very soul, but forgiving him releases you to move forward. Sounds like his family would be happy in knowing that it upsets you that they know. Maybe you can find a way to turn them finding out into something positive for you. Don't let them take you down to their level, some things just aren't worth the trouble and some people for that matter. You have done a great thing for you in having the surgery. Stay positive, this is about you not them!!!