HWA, I think at the moment you need to accept that your W is having an affair with an OW and it seems that the family is ok with this. Having come to this conclusion, what do you think you should do? If everyone else doesn't mind her being there, then I wouldn't kick up a fuss. It's up to you whether or not you feel comfortable going, but after all it is your future DIL's 21st. I would go and bite the bullet and be there for your sons and the rest of the family. You don't have to be in the same room as your W and OW, just be polite and treat her as you would a neighbour. I will be having a similar issue in October when my son turns 21. Have you got immediate family and what do they think about all this? You need to smooth the way ahead to make it a good party for your future DIL. After all, it is all about her. Don't go making a fuss, your sons will only resent you for it. Whether it is right or wrong in your eyes, everyone else seems ok with it so just go with the flow
H47 me48 T22 M21 S20 - Got high functioning autism 3/2000 H admits to OW and moves out to live with her 11/2000 H moves back home 2/4/13 H moves out H tells me he wants D 6/13, but now he can't afford to!