My fiance has an informal financial agreement with his ex (for child maintenance) and they never got a financial consent order (they are divorced). From what I understand she can make a claim on his assets at any point in her life (unless she remarries). I've brought up the issue of him sorting out a financial consent order before we get married, but he refuses saying she will never make a claim as "she's not like that". Am I being unreasonable or is he being naïve?