diff --git a/lib/custom_errors.rb b/lib/custom_errors.rb
index 53431de..ee092f6 100644
--- a/lib/custom_errors.rb
+++ b/lib/custom_errors.rb
@@ -7,7 +7,21 @@ def initialize(name)
 
   def get_married(person)
     self.partner = person
-    person.partner = self
+    if person.class != Person
+      begin
+        raise PartnerError
+      rescue PartnerError => error
+        puts error.message
+      end
+    else 
+      person.partner = self
+    end
+  end
+
+  class PartnerError < StandardError
+    def message
+      "you must give the get_married method an argument of an instance of the person class!"
+    end
   end
 
 end