Simplify the following text for a Grade 9 native English-speaking person.
Original: The queen finally forced the Heungseon Daewongun to retire by arguing that Gojong , now twenty-two , should govern in his own right and banished the concubine .
Simplified: With the approval of Gojong and the Royal Council , Heungseon Daewongun was forced to retire to his estate at Yangju in 1872 . She then banished the royal concubine and her child to a village outside the capital , stripped of royal titles .