If your wife is able to retire, and chooses not to retire, it doesn't change the fact that you are the "FI" part of FIRE. You don't have to live vicariously through us, you are there. And being (and I am assuming that you are) a SAHD, it's just another aspect of living, and I think you'd have a lot to add here. Personally, I'm not in that situation, but I think that there are a fair amount of people here who would benefit from your outlook.
Welcome, and thank you for being here!!!