I reccomend you have a scripted response ready for each occasion :

1. Exposure to OM's friends
2. Exposure to church members
3. Exposure to OMW
4. Exposure to OM

All of these scripts will say something a bit different. If you have it written ahead of time (short and simple is best) then you will handle exposure much better. There is a VERY WIDE gradient with exposure - it can be done very well, or it can be done clumsily or possibly make things worse for you.

Don't just wait around for the event to happen and them struggle for the right wording.. have a script in advance... and stick to the same one... it keeps your message strong and clear.

I am going to also reccomend that you have your wife take one of your children with her when she goes out.. you are NOT her baby sitter.. tell her she has a responsability just as much as you do... don't let her walk out that door leaving you with all the kids like that...

And they may not want to go.. but guess what? I bet they want their mother not doing what she's doing even MORE.. when they are older you can tell them how much they helped protect their mother... for now just send them along.