From someone who has had that conversation, please whatever you do, don´t tell her to snap out of it. Early on in my sitch, I never begged, cried or anything like that but I initiated several R talks. At one point I was frustrated and told my W to do just that - "snap out of this, this isn´t you! Stop this behavior"
The cold, dead stare I got back from her as I said that I will never forget. From that moment on, things really went downhill. She started going out more, hiding things from me and pretending to be single. Anything she could do to get away from me basically.
Now I´m no expert and I don´t know what my future holds, but the sooner you detach and do what the veterans here recommend, the better things will work out for you.
Me: 38 Stbxw: 35 No kids Mini bd: February 6, 2019 ONS confirmed Sept 7, 2019 Told her to move out: September 8, 2019 W moved out: September 28, 2019 Divorce filed by me: September 23, 2019