Or, you could simply have an adult discussion and tell her that you're being treated for prostate cancer....that it's a relatively common occurrence in men our age.....that it's been found early and there's every likelihood that it will turn out to be contained in the prostate gland and you will be "cured"....that even if it has escaped the prostate gland, it is not a disease that is going to take you away anytime soon, and that you still hope to see your grandchildren grow to adulthood.
Would you tell her if it were pancreatic cancer? Would you tell her if it were colon cancer? Would you tell her if it were brain or lung cancer?
I realize that every family dynamic is different, but this tiptoeing around what is going on is so foreign to me that I just can't understand it. This is life. These things happen. Women get breast and ovarian and uterine cancers. People get throat cancer and brain cancer. These things happen, and they're terrible, but that's why we're family: we fight these things as a team.
My family "activates the family prayer effort." I can't say that has any medicinal effect, but it brings us together and we share in our family joys and our family pains. I can't tell you what comfort it gave me in the hospital bed after surgery to know that literally hundreds of friends and relatives were pulling for my recovery.
Also, please bear in mind that not every robotic surgery sees the patient going home the next day. I was in the hospital for 3 days, and I was in no hurry to leave until I felt ready.
I truly wish you all the best. I hope your surgery is a resounding success. But the idea of talking about "naughty bits" (I don't think any part of me is "naughty") or that it might affect business is so far removed from my personal experience that it just makes no sense to me. I wouldn't put the news on Facebook, either...at least not in my profile, but people can infer what's happened to me when I reference upcoming activities in support of prostate cancer awareness.
I'm sure you'll find your way through these things and you'll do what works for you. Just thought I'd add my two cents and my sincere wishes for a completely positive outcome. Bill