Simplify the following text for a Grade 10 native English-speaking person.
Original: In 1953 , he wrote an article called `` Marilyn Monroe Was My Wife '' for Photoplay , in which he said that she threatened to jump off the Santa Monica Pier if he left her .
Simplified: In 1953 , he wrote a piece called `` Marilyn Monroe Was My Wife '' for Photoplay , in which he claimed that she threatened to jump off the Santa Monica Pier if he left her .