If I have to rely on my wife at sea I might as well put a gun to my head right now.
If you aren't kidding about your wife, don't go. If you can't depend on your only crew you can be in serious trouble. You will be single handing while carrying a passenger. While a single hander accepts the risks of his(or her) adventure I would be reluctant to impose those risks on a passenger who hasn't the knowledge or experience to understand them. Daysailing is one thing but passages are long, can be tedious and can become very uncomfortable. If you're not in it together, it will be tough.