diff --git a/backend/src/routes/family.rs b/backend/src/routes/family.rs
index 506a4b0..e060e70 100644
--- a/backend/src/routes/family.rs
+++ b/backend/src/routes/family.rs
@@ -221,6 +221,7 @@ pub struct CreateMyFamilyResponse {
 )]
 pub async fn create_my_family(
     auth_session: AuthSession<AuthBackend>,
+    session: Session,
     State(db): State<DatabaseConnection>,
     Json(payload): Json<CreateMyFamilyRequest>,
 ) -> Result<Json<CreateMyFamilyResponse>, StatusCode> {
@@ -247,6 +248,17 @@ pub async fn create_my_family(
         .await
         .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
 
+    let mut authorized_families: Vec<i32> = session
+        .get("authorized_families")
+        .await
+        .unwrap_or(None)
+        .unwrap_or_default();
+    authorized_families.push(family.id);
+    session
+        .insert("authorized_families", authorized_families)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
     Ok(Json(CreateMyFamilyResponse {
         family_id: family.id,
         user_id: current_user.id,
diff --git a/backend/src/routes/oauth.rs b/backend/src/routes/oauth.rs
index 511f84b..9bc1031 100644
--- a/backend/src/routes/oauth.rs
+++ b/backend/src/routes/oauth.rs
@@ -119,6 +119,21 @@ pub async fn google_callback(
         .await
         .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
 
+    if let Some(family_id) = user.family_id {
+        let mut authorized_families: Vec<i32> = session
+            .get("authorized_families")
+            .await
+            .unwrap_or(None)
+            .unwrap_or_default();
+        if !authorized_families.contains(&family_id) {
+            authorized_families.push(family_id);
+            session
+                .insert("authorized_families", authorized_families)
+                .await
+                .ok();
+        }
+    }
+
     let redirect_url = frontend_url.unwrap_or_else(|| "http://localhost:3000".to_string());
 
     Ok(Redirect::temporary(&redirect_url))