Most of the time, when you hand in your notice any accrued leave is given to you and you aren't required to spread it out. There is probably a legal / employment law position on this but in most instances it is worked out between the parties. If your wife is and has been unhappy then why prolong it?
From what you've said, if it were me, then I'd hand in my notice including a date for my last day and say thanks very much.