Rock is between a rock and a hard place.
Sorry, couldn't resist.
In all seriousness Rock, it's hard when your significant other is not behind you. I've been fortunate that through my careers as a broker and now an independent trader, I've had a very supportive person behind me. While not married, for sake of discussion, we are. And for the most part, she's been behind me 100% whether taking a full commission job or leaving that job once I 'made it' to then take on another 100% 'commission' type job. That was not easy for me, but she's been there every step of the way.
I cannot comment on what to do if she's not behind you. You need to talk it out and get it out in the open. If she's not behind you, you'll have to find a middle ground where she supports you (as much as possible) but you stay open with her on your progress.
I think the key here is really laying the proper groundwork and expectations. What I mean is, while we all get into trading to eventually become multi-millionaires, we also know it's a long, tough road to get there. I think you need to set realistic goals and then share these with her. Example - if your goal is to make $100/day, let her know daily if you hit your goal or not. Bring her INTO your new business, NOT push her away. This is essential in my opinion. While she may not be 100% on board, if you show that you are doing your job and meeting your goals, it may help lighten the load. And when you don't hit your goal for the day, talk about that too. I guess in the end, you want her to become a part 'owner' if you will.