David and Cheryl Allen are in their mid-30's and have two children, ages 8 and 5. They have combined annual income of $95,000 and own a house in joint tenancy with a market value of $310,000, on which they have a mortgage of $250,000. David has $100,000 in group term life insurance and an individual universal life policy for $150,000. However, the Allens haven't prepared their wills. David plans to do one soon, but they think that Cheryl doesn't need one because the house is jointly owned. As their financial planner, explain why it's important for bith David and Cheryl to draft wills as soon as possible.