One of the reasons you might consider a post-marital contract is if you are in your second (or third) marriage and have children from a previous marriage. You may want to make sure that a portion of your wealth goes to your children. Another possible reason for a post-up is that someone is unfaithful and one partner wants to convince the other to work on marriage. Signing an additional contract with terms favorable to your spouse can show that you are serious about wanting to stay married. Finally, you may want to get an additional contract if you want to leave the staff, spend a lot of time caring for your children, and make sure you`re financially covered. .