I completely disagree. Shocking someone is not a good way to ask for acceptance.
IMO, the way to approach it is to pick a quiet time when the two of you are alone and otherwise unstressed. Tell her that you're feeling bad about something and need to talk. That will put her in an empathetic mindset and then you can proceed to the talk.
Remember, talking is a two-way street. It is as important to listen to your wife as it is to tell her about your feelings. She will have doubts and fears, particularly about how far your activity extends. Address them, but don't promise anything you can't live with. "I don't know" is an acceptable answer if it is honest.
"The Talk" is a start. There will be many talks as you both work your way through the issue. Give her plenty of time to assimilate the situation. This is completely new for her and requires considerable adjustment. She probably won't have anyone to talk to about it except you. The FAB forum here might provide an outlet for her.
I wish you good luck.
Eryn