ELI5: Explain Like I'm 5

Free union

A free union is a kind of relationship between two people who are not married, but live together. They might live in the same house, or they might be in different places but still stay in touch. They might even have children together, but they don't share the same last name or legal status that married couples do. Free unions are a way for people to share their love and life together without making a legal commitment.