diff --git a/lib/identity_cache.rb b/lib/identity_cache.rb
index 73d6b423..0aa7e0a2 100644
--- a/lib/identity_cache.rb
+++ b/lib/identity_cache.rb
@@ -191,6 +191,16 @@ def fetch_multi(*keys)
       result
     end
 
+    def with_deferred_parent_expiration
+      # Bonus: Do this in one external call (if possible)
+      Thread.current[:deferred_parent_expiration] = true
+      Thread.current[:parent_records_for_cache_expiry] = Set.new
+
+      yield
+
+      Thread.current[:parent_records_for_cache_expiry].each(&:expire_primary_index)
+    end
+
     def with_fetch_read_only_records(value = true)
       old_value = Thread.current[:identity_cache_fetch_read_only_records]
       Thread.current[:identity_cache_fetch_read_only_records] = value
diff --git a/lib/identity_cache/parent_model_expiration.rb b/lib/identity_cache/parent_model_expiration.rb
index 1993a21c..440c7f4b 100644
--- a/lib/identity_cache/parent_model_expiration.rb
+++ b/lib/identity_cache/parent_model_expiration.rb
@@ -47,6 +47,10 @@ def expire_parent_caches
       add_parents_to_cache_expiry_set(parents_to_expire)
       parents_to_expire.select! { |parent| parent.class.primary_cache_index_enabled }
       parents_to_expire.reduce(true) do |all_expired, parent|
+        if Thread.current[:deferred_parent_expiration]
+          Thread.current[:parent_records_for_cache_expiry] << parent
+          next parent
+        end
         parent.expire_primary_index && all_expired
       end
     end
diff --git a/test/index_cache_test.rb b/test/index_cache_test.rb
index f80bd6cd..7b7e9a74 100644
--- a/test/index_cache_test.rb
+++ b/test/index_cache_test.rb
@@ -166,6 +166,84 @@ def test_unique_cache_index_with_non_id_primary_key
     assert_equal(123, KeyedRecord.fetch_by_value("a").id)
   end
 
+  def test_with_deferred_parent_expiration
+    # TODO: Delete these notes
+    # Done: Create a record (`Item`) with associated records (`AssociatedRecord`) outside of "recorded space"
+    # Done: Start recording externals
+    #   Done: Open defer block
+    #     Done: Open tx
+    #       Done: Delete all of the associated records
+    #     Done: Inside defer block (outside tx) assert that no external calls have been made yet
+    #     Done: Outside defer block (outside tx) assert that:
+    #       - External calls have now been made
+    #       - `Item` was expired only once
+    #       - `AssociatedRecord` was expired once each
+
+    Item.send(:cache_has_many, :associated_records, embed: true)
+
+    @parent = Item.create!(title: "bob")
+    @records = @parent.associated_records.create!([{ name: "foo" }, { name: "bar" }, { name: "baz" }])
+
+    @memcached_spy = Spy.on(backend, :write).and_call_through
+
+    expected_item_expiration_count = Array(@parent).count
+    expected_associated_record_expiration_count = @records.count
+
+    IdentityCache.with_deferred_parent_expiration do
+      @parent.transaction do
+        @parent.associated_records.destroy_all
+      end
+      assert_equal(expected_associated_record_expiration_count, @memcached_spy.calls.count)
+    end
+
+    expired_cache_keys = @memcached_spy.calls.map(&:args).map(&:first)
+    item_expiration_count = expired_cache_keys.count { _1.include?("Item") }
+    associated_record_expiration_count = expired_cache_keys.count { _1.include?("AssociatedRecord") }
+
+    assert_operator(@memcached_spy.calls.count, :>, 0)
+    assert_equal(expected_item_expiration_count, item_expiration_count)
+    assert_equal(expected_associated_record_expiration_count, associated_record_expiration_count)
+  end
+
+  def test_deep_association_with_deferred_parent_expiration
+    # OPTIONAL / EXTRA CREDIT: What happens when nested association does the same thing? Prod/PV/IIV case?
+
+    AssociatedRecord.send(:has_many, :deeply_associated_records, dependent: :destroy)
+    Item.send(:cache_has_many, :associated_records, embed: true)
+
+    @parent = Item.create!(title: "bob")
+    @records = @parent.associated_records.create!([{ name: "foo" }, { name: "bar" }, { name: "baz" }])
+    @records.each do
+      _1.deeply_associated_records.create!([
+        { name: "a", item: @parent },
+        { name: "b", item: @parent },
+        { name: "c", item: @parent },
+      ])
+    end
+
+    @memcached_spy = Spy.on(backend, :write).and_call_through
+
+    expected_item_expiration_count = Array(@parent).count
+    expected_associated_record_expiration_count = @records.count
+    expected_deeply_associated_record_expiration_count = @records.flat_map(&:deeply_associated_records).count
+
+    IdentityCache.with_deferred_parent_expiration do
+      @parent.transaction do
+        @parent.associated_records.destroy_all
+      end
+    end
+
+    expired_cache_keys = @memcached_spy.calls.map(&:args).map(&:first)
+    item_expiration_count = expired_cache_keys.count { _1.include?("Item") }
+    associated_record_expiration_count = expired_cache_keys.count { _1.include?(":AssociatedRecord:") }
+    deeply_associated_record_expiration_count = expired_cache_keys.count { _1.include?("DeeplyAssociatedRecord") }
+
+    assert_operator(@memcached_spy.calls.count, :>, 0)
+    assert_equal(expected_item_expiration_count, item_expiration_count)
+    assert_equal(expected_associated_record_expiration_count, associated_record_expiration_count)
+    assert_equal(expected_deeply_associated_record_expiration_count, deeply_associated_record_expiration_count)
+  end
+
   private
 
   def cache_key(unique: false)