When you die, you are sent to purgatory to choose which version of heaven to spend your eternity in. Until a choice is made, you are not allowed to leave purgatory. The decision can only be taken once and is irreversible.
You are Joan. You fell in love with your first husband, Luke, at the age of 21 and married that same year. A year later, Luke was drafted into the army and died at war. Shortly after, you met Larry, whom you would marry a couple of years later and start a family with. After 67 years of marriage, Larry dies of old age, a week after which, you also die.
In the afterlife, you find your husbands waiting for you; Larry, who waited a week for you to arrive, and Luke, who waited 69 years. Both of them want to spend eternity with you in their own separate versions of heaven.