diff --git a/extensions/tags/src/Api/Controller/ShowTagController.php b/extensions/tags/src/Api/Controller/ShowTagController.php
index 4ae528783..19f23fda3 100644
--- a/extensions/tags/src/Api/Controller/ShowTagController.php
+++ b/extensions/tags/src/Api/Controller/ShowTagController.php
@@ -49,11 +49,26 @@ class ShowTagController extends AbstractShowController
         $slug = Arr::get($request->getQueryParams(), 'slug');
         $actor = RequestUtil::getActor($request);
         $include = $this->extractInclude($request);
+        $setParentOnChildren = false;
 
-        return $this->tags
+        if (in_array('parent.children.parent', $include, true)) {
+            $setParentOnChildren = true;
+            $include[] = 'parent.children';
+            $include = array_unique(array_diff($include, ['parent.children.parent']));
+        }
+
+        $tag = $this->tags
             ->with($include, $actor)
             ->whereVisibleTo($actor)
             ->where('slug', $slug)
             ->firstOrFail();
+
+        if ($setParentOnChildren && $tag->parent) {
+            foreach ($tag->parent->children as $child) {
+                $child->parent = $tag->parent;
+            }
+        }
+
+        return $tag;
     }
 }
diff --git a/extensions/tags/src/TagRepository.php b/extensions/tags/src/TagRepository.php
index ba877ca92..89a0b06ff 100644
--- a/extensions/tags/src/TagRepository.php
+++ b/extensions/tags/src/TagRepository.php
@@ -14,7 +14,7 @@ use Illuminate\Database\Eloquent\Builder;
 
 class TagRepository
 {
-    private const TAG_RELATIONS = ['children', 'parent'];
+    private const TAG_RELATIONS = ['children', 'parent', 'parent.children'];
 
     /**
      * Get a new query builder for the tags table.
diff --git a/extensions/tags/tests/integration/api/tags/ListTest.php b/extensions/tags/tests/integration/api/tags/ListTest.php
index c33efa790..6fad63158 100644
--- a/extensions/tags/tests/integration/api/tags/ListTest.php
+++ b/extensions/tags/tests/integration/api/tags/ListTest.php
@@ -83,15 +83,16 @@ class ListTest extends TestCase
     }
 
     /**
+     * @dataProvider listTagsIncludes
      * @test
      */
-    public function user_sees_where_allowed_with_included_tags()
+    public function user_sees_where_allowed_with_included_tags(string $include, array $expectedIncludes)
     {
         $response = $this->send(
             $this->request('GET', '/api/tags', [
                 'authenticatedAs' => 2,
             ])->withQueryParams([
-                'include' => 'children'
+                'include' => $include
             ])
         );
 
@@ -106,7 +107,7 @@ class ListTest extends TestCase
         // 6, 7, 8 aren't included because child access shouldnt work unless parent
         // access is also given.
         $this->assertEquals(['1', '2', '3', '4', '9', '10', '11'], Arr::pluck($data, 'id'));
-        $this->assertEquals(['3', '4'], Arr::pluck($included, 'id'));
+        $this->assertEquals($expectedIncludes, Arr::pluck($included, 'id'));
     }
 
     /**
@@ -125,4 +126,12 @@ class ListTest extends TestCase
         $ids = Arr::pluck($data, 'id');
         $this->assertEquals(['1', '2', '3', '4', '9', '10'], $ids);
     }
+
+    public function listTagsIncludes(): array
+    {
+        return [
+            ['children', ['3', '4']],
+            ['parent', ['2']],
+        ];
+    }
 }
diff --git a/extensions/tags/tests/integration/api/tags/ShowTest.php b/extensions/tags/tests/integration/api/tags/ShowTest.php
new file mode 100644
index 000000000..959c99a08
--- /dev/null
+++ b/extensions/tags/tests/integration/api/tags/ShowTest.php
@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Tags\Tests\integration\api\tags;
+
+use Flarum\Group\Group;
+use Flarum\Tags\Tests\integration\RetrievesRepresentativeTags;
+use Flarum\Testing\integration\RetrievesAuthorizedUsers;
+use Flarum\Testing\integration\TestCase;
+use Illuminate\Support\Arr;
+
+class ShowTest extends TestCase
+{
+    use RetrievesAuthorizedUsers;
+    use RetrievesRepresentativeTags;
+
+    /**
+     * @inheritDoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->extension('flarum-tags');
+
+        $this->prepareDatabase([
+            'tags' => $this->tags(),
+            'users' => [
+                $this->normalUser(),
+            ],
+            'group_permission' => [
+                ['group_id' => Group::MEMBER_ID, 'permission' => 'tag8.viewForum'],
+                ['group_id' => Group::MEMBER_ID, 'permission' => 'tag11.viewForum']
+            ]
+        ]);
+    }
+
+    /**
+     * @dataProvider showTagIncludes
+     * @test
+     */
+    public function user_sees_tag_relations_where_allowed(string $include, array $expectedIncludes)
+    {
+        $response = $this->send(
+            $this->request('GET', '/api/tags/primary-2-child-2', [
+                'authenticatedAs' => 2,
+            ])->withQueryParams([
+                'include' => $include
+            ])
+        );
+
+        $this->assertEquals(200, $response->getStatusCode());
+
+        $responseBody = json_decode($response->getBody()->getContents(), true);
+
+        $included = $responseBody['included'] ?? [];
+        $this->assertEqualsCanonicalizing($expectedIncludes, Arr::pluck($included, 'id'));
+    }
+
+    public function showTagIncludes(): array
+    {
+        return [
+            ['children', []],
+            ['parent', ['2']],
+            ['parent.children', ['3', '2']],
+            ['parent.children.parent', ['3', '2']],
+        ];
+    }
+}