Generally speaking, prenuptial agreements speak to each partner’s rights on the issues of:
Alimony
Equitable division of assets and liabilities
Marital and separate property
Child custody matters however are not appropriate issue inclusion in the agreement. Florida law and public policy do not allow these matters to be addressed before there is a child custody dispute. Other legal nuances stand to limit the terms if a prenup, so drafting is best left to an experienced family law attorney.