Rey has worked for "Charlie Hebdo" since 2009, where she did editing and contributed editorial cartoons. She was present at the 2015 massacre at the "Charlie Hebdo" offices in which twelve were killed. On 7 January 2015, two masked gunmen approached her at the building that houses the "Charlie Hebdo" offices. They threatened to kill her, and her young daughter, if she did not enter the passcode to enter the building. They took her to the "Charlie Hebdo" on the second floor, where she witnessed them kill cartoonists Georges Wolinski and Cabu as she hid under a desk. The gunmen proceeded to another room and fired on the fifteen people in a meeting in progress.