I am married in Baltimore, Maryland. We do not have wills. We do not own property. Our only asset will be a life insurance upon death of either of

It is always a good idea to have a will even if you do not presently own property. Any asset  regardless of its value owned by you is subject to inheritance and probate laws. It is always possible that you will acquire property in the future, e.g. property inherited by you, cars, bank accounts, IRS's, lottery winnings, real estate, etc. With a will you can also select who your Personal Representative will be.