Same here on being raised to not discuss the three above in a setting as you describe. But, Victoriawtx, if you've been "discussing" your husband at work as much as you have on this board....then I'd presume that you've already discussed at least one of these three in the workplace....SO - it seems you'll have to ask YOURSELF why she is asking you these personal questions.
Just a thought - of which there are many...Maybe she's checking out backyards to see if the grass is greener on the other side. Because, obviously, as others have eluded to on here in regard to your dilemma with your non-diving (thus far) spouse, you seem to be seeing it from inside the box rather than outside of it. Could be the same situation here! Let's open a small window - just one of many you can open once you allow some light in. She may see that you are heading down a path of no return and she may want to jump the fence or knows somebody that does - if it's worth it! Remember? One person's junk is another person's treasure.
Of course, not knowing the "nosey" person or her circumstances (and I'm not asking for any more details..please) I'd have to say that she's got her reasons to be asking (not that any of us would agree that many, would be valid) - so consider the source of the question as well as the reason why you think she feels comfortable asking you or anybody else in your workgroup.
Seems to me that the situation you've described could easily be handled by someone who, in the workplace, has previously exhibited a mature and responsible attitude toward others' privacy and, just as importantly, that person's own discretion as to their personal matters. Eventually, you'll get it and so will she.
It usually turns out that you must keep "reliving" certain situations until you do "get it"....and I'm not talking anything metaphysical here....just plain day to day practical experience. You know the facts. Face them with an open mind, then take the appropriate action and I'm sure this situation will resolve itself in the time that it took for it to develop.
Talking through problems is helpful, but only up to a certain point, after that - it's just talking about talking about talking about solving the problem...a time comes when you have to act rather than talk about it. (Speaking from personal experience here.) You can do this!!
You've already proven to yourself, your husband and now this board that you really can do something if it is something YOU want to do! If you really want her to stop asking personal questions, you'll figure out a way for that to happen. Nothing to prove here... just do what's right for all involved and things will eventually be ok. And speaking to the diving/non-diving spouse issue - Right now, time is your ally - improve your odds with patience and priorities. I have no doubt that you will be diving in the future! Repeat after me (silently) I will dive in the future, I will dive in the future, I will dive in the future. Now just relax about it for a while and he will too.
Ok...that's it from me...I've been in the box, out of the box and on top of it...enough said !!