Simplify the following text for a Grade 9 native English-speaking person.
Original: Jahan 's eldest daughter , the devoted ( loving ) Jahanara Begum , slowly brought him out of mourning and took the place of Mumtaz at court .
Simplified: Shah Jahan 's eldest daughter , the devoted Jahanara Begum , gradually brought him out of grief and took the place of Mumtaz at court .