diff --git a/music_kraken/objects/collection.py b/music_kraken/objects/collection.py
index 5e078fb..ad2890a 100644
--- a/music_kraken/objects/collection.py
+++ b/music_kraken/objects/collection.py
@@ -58,7 +58,7 @@ class Collection(Generic[T]):
             self._indexed_values[name].add(value)
             self._indexed_to_objects[value].append(__object)
 
-        if not from_map:
+        if not from_map or True:
             for attribute, new_object in self.contain_given_in_attribute.items():
                 __object.__getattribute__(attribute).contain_collection_inside(new_object)
 
@@ -110,7 +110,7 @@ class Collection(Generic[T]):
         if self._contained_in_self(__object):
             return [self]
 
-        for collection in self.children:
+        for collection in (*self.children, *self.parents):
             results.extend(collection._contained_in_sub(__object, break_at_first=break_at_first))
 
             if break_at_first:
diff --git a/music_kraken/objects/song.py b/music_kraken/objects/song.py
index 93bd9a2..716694c 100644
--- a/music_kraken/objects/song.py
+++ b/music_kraken/objects/song.py
@@ -244,6 +244,9 @@ class Album(Base):
         self.song_collection.contain_attribute_in_given = {
             "main_artist_collection": self.artist_collection
         }
+        self.song_collection.append_object_to_attribute = {
+            "album_collection": self
+        }
 
     def _add_other_db_objects(self, object_type: Type[OuterProxy], object_list: List[OuterProxy]):
         if object_type is Song: