Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1125 , Matilda married Stephen of Blois , Count of Mortain , who possessed a large honor in England . When Matilda 's father abdicated and retired to a monastery the same year , this was joined with Boulogne and the similarly large English honor Matilda inherited .
Simplified: Matilda married Stephen I of England in ( 1125 ) They were deeply in love until two of there children died Baldwin and Matilda .