Your spouse can write a will and cut you out. If she consults an attorney, however, he or she probaby will identify the problem with such a plan.
After her death, you could petition the probate court to divide her estate under intestacy. In other words, probate would proceed as if there was no will.
In most states, a surviving spouse gets anywhere from one-third to one-half of the other spouse's estate, regardless of what the will says. You would have to talk to a local attorney to learn the specifics for Florida.
Some stuff, such as a house, may pass by title and not be subject to probate.