You should only go if you can act AS IF it's water off your back. If you can't stomach this behavior from your wife without acting bothered, sad, depressed ...don't go It will be a slide backwards....sometimes we have turn away opportunities to DB because we can't do it at that time.
When ever I couldn't do it good...I laid low. Now, because it is your sons birthday party I would certainly try to pull up my boot straps.
One question I always ask myself....."Is what I'm about to SAY or DO going to put me closer to my goal." If the answer was NO, (it usually was)I did nothing. It was a rule that I lived by always, no compromise. It helped because I always had to pause and ask myself the question, thus giving me time to think about it.
Also, you should not indulge in alcohol at this event..that's like pouring Gas on an open flame. Both of you drinking together at this stage is not good.
Hey, find something fun for you to do this weekend.
M:47 M:18 D16, S19 1st S 1/08-5/08 Reconciled/May 7, 2008 Left again Nov 9, 2009 I Filed: Nov 17, 2009 Final: April 14, 2010 EX walked away from kids too