Hi Lisa,
The simple answer is NO WAY!!!
You could be opening a can of worms, if the partner is causing you trouble and the hubby is going to loose his job, what does that tell you?
If she won't change with the business and you have issue with her, then start to manage her out of the business. I know in theory you shouldn't do this, but there are legal ways and means of working someone out, who won't comply.
It's your business and you have to make changes to grow, there are plenty of people around your area that would love to work and go with the flow!!
Get rid!!!! I would.
Take Care, but be careful. You run your business not your staff, remember that girlie!!!!