The two of you need to have a meeting of the minds, I have been in bussiness with my wife for 5 years so I can understand some of what you are going through.

1st your wife needs to know that you two must share everything about the business with each other, even if somethings may make the other person mad.

2nd As everyone else has said you all need to have your own areas you are in charge of.

3rd On of you must have final say in the business 100% of the time.

If you don't get this under control it could really hurt your business in the long run.

I hope some of this helps.