You will AGAIN agree to see your WW. You will dump a potential great girl to get back with WW. WW in turn will tell her OM, who will now beg her back, just like the last time. He'll change his tune, which will change your WW's tune, and you'll be back to square one. Again. Only this time, without the great girl you're seeing now, and without WW.
OR - you could block WW completely from your life (except to sign divorce papers), enjoy your new life with your new love and move on.
Look at the laws in your state - have you been separated long enough to get a divorce without her consent? (I may be sounding like an idiot here, I'm not sure how divorce works when one wants it and the other doesn't). I'd lawyer up, figure out how to divorce her ASAP, this way this shows your new girl you're serious about a relationship with HER.
Me: 52 Her: 48 2D 26 & 16 M: 25 years (together 30) EA/discovered by accident Valentines day 2016 Admitted SOME physical but no IC. We know that's a lie. Status - tryin to R