Lees, I can't even begin to imagine how hard it is having to see OW every day. Blech. I would so want to just let her have it.
As hard as it is, you must be the better person. Don't sink to their level because you ARE better than that! OW may be smug now, but you and she both know that STBX can and probably will leave her for the next OW. There is no way she can be confident in their R. And besides, OW & STX are both lying cheats--they deserve each other. YOU deserve much, much better. They are the ones settling for dregs. STBX traded down and you will be trading up!
Do not let them see you looking sad and miserable. Remind yourself that you have a bright future ahead and project that confidence. Fake it if you have to, eventually you won't be faking it because you will believe it. You can cry, scream, and otherwise let it out when you're in private.
Remember, the best revenge is a life lived well.
And yes, I know it all sounds like drivel when you're miserable. But it is true and you will get through this.
Time for more GAL activities and whatever else makes you happy.
I'm off on vacation for the next 10 days. Didn't want you to think I'm abandoning you. See you in June!
If you love somebody, set them free. http://tinyurl.com/2empx2g