diff --git a/backend/app/models/user.py b/backend/app/models/user.py
index 8ce7f88..787d829 100644
--- a/backend/app/models/user.py
+++ b/backend/app/models/user.py
@@ -23,6 +23,8 @@ class User(Base):
     sessions = relationship("Session", back_populates="user", cascade="all, delete-orphan")
     worlds = relationship("World", back_populates="owner")
     assets = relationship("Asset", back_populates="owner")
+    owned_groups = relationship("Group", back_populates="owner")
+    group_memberships = relationship("GroupMember", back_populates="user")
 
     @property
     def is_adult(self) -> bool: