Simplify the following text for a Grade 11 native English-speaking person.
Original: Sophia Dorothea 's father , George William , and George Louis , had Sophia Dorothea imprisoned in Ahlden Castle in Celle , where she was unable to see her father , former husband , or children .
Simplified: With the concurrence of her father , George had Sophia Dorothea imprisoned in the Castle of Ahlden in her native Celle , where she stayed until she died more than thirty years later .