I'm so sorry you are having to go through this...but just so ya know. Your WW is following the infidelity script to a "T", as I'm sure NOP's has informed you. She's in the fog...and has been gaslighting you for some time, now she's going to start blameshifting and rewriting your marital history (if she hasn't already).
You are doing the best things possible right now, cutting of her cell phone, taking her off the accounts etc. Do what you have to to protect yourself and take care of your boys.