The wording of this is going to be important. I really do not want her to control the narrative and say something like "We have decided..." or "Your father and I have decided..." when I decided no such thing. I do not want to demonize her to our sons, but at the same time I don't want them to believe that I think that this is "for the best."
I definitely have quoted some of the details on telling the children. This has been discussed here quit a bit.
This is one of the most difficult parts of the process. Get yourself prepared by searching through the quotes threads.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712