I struggled with the same thing Kgirl. Do not say anything. In my case, I basically forced the S with my WAW and the last thing I told her was basically I was done and I would give her the divorce she wanted. Sandi said some things that made a lot of sense, and are in line with what Ggrass said. Your S knows you, and knows that if they really wanted to work on a R, how to get in touch with you about it. One of the best things you can do, or so I have been told, is make your S think you are truly done. This is what you have done.
Best of luck to you.
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16