I'm hearing a lot of good advice here, but I'm going to throw in my $.02 anyways. I'm in a similar situation inasmuch as I'm working and my lovely wife isn't (decision by choice, not force. Don't know your situation and frankly it's none of my business...). When I was initially getting into the knifemaking hobby (habit?) I was all gung-ho 24/7 knives. Reading, researching, and generally being a chatterbox about it. It irritated her to no end. Not because I was doing something I enjoyed and she wasn't or anything, but mostly because she honestly didn't care about it the way I did.
We had a sort of defining moment just prior to my blacksmith guild's annual shin-dig this year. I was working on a knife for the knifemaking competition and having a pretty bad time of it. A blade that I had a month of evenings and weekends into turned out to be cracked (but I couldn't see it until I buffed it out). This happened a week before the contest. I finished a new knife in time (3 handles and 2 guards later), but almost lost my good relationship with my wife. I had gotten so sucked into it that for that week it was ALL I thought about, ALL I did, an certainly ALL I talked about. She was ready to kill me. After it was all said and done we talked, and she told me that "if this is the way knifemaking is going to be, you'd better find another hobby or another wife". Turns out what the problem was was that it was supposed to be something I enjoyed, but it was stressing me out (and stressing her out because of that).
Now, that doesn't sound anything like your situation, but I did learn a few things in the process of this conversation with her:
- All I was thinking about was that knife
- All I was worrying about was that knife
- All I was talking about was that knife
- All I wanted to do was be happy with that knife
Now, look at the above list and try to find the 'wife' in there. Certainly sometimes you should just replace the 'knife' above with 'wife'. It took us almost having some real problems for me to realize that I was a little obsessed. We talked, I realized that, admitted it, felt terrible about neglecting her (she is ultimately the only thing in my life that matters worth a damn. If I had to set down my hamer and turn off the grinder forever to keep her, there would be no second thought.), and told her all of that.
Fast forward bit and I have the most supportive wife a guy could hope for. She let me put up a shop building, build a grinder, buy a power hammer (that I haven't even gotten to bring home yet!), gas forge, etc, she puts up with the near constant deliveries of little boxes of wood and steel and supplies. Heck, when I mentioned needing to get stencils so I could mark a blade I'm working on now (it's for a trade item at my blacksmith guild meeting...it'll be the first piece that anybody but me gets) she said to tell them that I'd mark it later so that I could make one for her that would be the first one I mark.
Your situation undoubtably is different, but my point is that if you figure out what is stressing your wife out about your knifemaking you can work it out. She may even end up being your biggest fan!
Good luck man,
-d