Is there an END limit statute for a prenup in the state Of Florida ?

Many pre-nups provide for different terms, or even that they are no longer in force, once a marriage  has lasted a given number of years.  If yours isn't one of them, however, it is likely still in effect.  Contracts don't stop being binding just because of the passage of time.  Although pre-nuptial agreements are a little more subject to challenge than commercial contracts negotiated at arms length between people of equal bargaining power, I know of no rule that they become invalid after a given number of years.  It is possible, however, that Florida has different rules than the states in which I practice.