St. Paul says, “A married woman is bound by law to her husband as long as he lives; but if her husband dies she is discharged from the law concerning the husband” (Rom. 7:2). This means that the marital bond ceases with the death of either spouse, and the marriage has ended. Even if you were married to multiple people in this life, you will not be married to anyone in heaven. Jesus taught that we will not be married in heaven: “When they rise from the dead, they neither marry nor are given in marriage, but are like angels in heaven” (Mark 12:25).
Sacraments like marriage are “road signs” that point us to our final heavenly destination and give us the grace to continue that journey. But when you reach your destination, road signs are no longer needed, and so sacraments such as baptism, confession, and even marriage will not exist in heaven (though the indelible marks on our souls we receive from sacraments like baptism or holy orders will remain with us for all eternity).