Me 14 months on, affair confirmed, someone new?

[hotwheelsaust]

Ok need an answer to this important question please:
At the end of February I was intending to go to my future daughter in law's 21st. The party is a 2 hour drive away in a country town and most party goers are camping the night and a big brekkie is being put on the next morning.
Well I just found out tonight, the W will be coming and will also be bringing the OW. When I mentioned how disrespectful this is to the DIL, my sons and me, was told the DIL and my sons are ok with this and the rest of the family, while not having the affair confirmed by W, all accept she is having the affair and they are all ok with her bringing OW as well.

So my question is, do I still go to the party, with the knowledge that my W is taking the OW and everyone seems to be ok with this? Do I bite the bullet and be the better person and ignore what the W is doing? Do I stand for my rights and simply say, sorry, but I still find this disrespectful to me, my sons, my future DIL?

Or is there something else I should do?