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-rw-r--r--lib/family_tree.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/family_tree.rb b/lib/family_tree.rb
index 9850280..4fa5dca 100644
--- a/lib/family_tree.rb
+++ b/lib/family_tree.rb
@@ -67,7 +67,7 @@ class FamilyTree
case relationship.downcase
when 'mother', 'father'
handle_parent_relationship(child_of_family, relationship)
- when 'siblings'
+ when 'siblings', 'sibling'
handle_siblings_relationship(child_of_family, name)
when 'child', 'daughter', 'son'
handle_children_relationship(parent_of_family, relationship)