Simplify the following text for a Grade 5 native English-speaking person.
Original: James Madison married Dolley Payne Todd , a widow , on September 15 , 1794 , in what is now Jefferson County , West Virginia . Madison adopted Todd 's one surviving son , John Payne Todd , after the marriage .
Simplified: Madison married Dolley Todd nee Payne in April 18 , 1794 .