I’ll add this to the great advice you’ve already received;
Give her a few days to digest before the next move and watch for signals that its the time to talk, giving her a little time will also give her a chance to bring it up herself.
Perhaps you can bring your sister into it, it may help your wife to have another GG in the room.
Don’t give her too much to handle when you have the talk, give her everything she needs or asks for, try to listen even though you’ll likely be bursting to tell her all aspects.
When you’re dressed in front of here, dote on her, lavish her with attention and affection if she’s receptive while dressed, you’re trying to impress on her that life will be better this way.
Good luck Candace.