Wow. Just wow. She is quite the brazen, bold OW. Funny she has such self confidence for a woman that only goes after married men. Such issues she must have.
I am sorry. Sounds like you are dealing well with it, I know it must be very hard.
My coworker adopted her H's 'affair baby' years ago. He still sees his biological mother, but very rarely.
Keep us posted and remember you are the stable and steady one here, don't let them shake you.