updated 07/01/2011 AT 6:00 PM ET
•originally published 07/01/2011 AT 8:45 PM ET
Salma Hayek’s daughter, Valentina Paloma Pinault, 3, has a second half-brother.
According to court papers recently filed by supermodel Linda Evangelista, her son, Augustin James, 4, was fathered by Hayek’s husband, François-Henri Pinault. Hayek and Pinault wed in 2009, but dated since 2006, around the time Evangelista got pregnant. (Pinault has two other children – a son and a daughter – from his previous marriage, which ended in divorce in 2004.)
Now Evangelista has filed a petition seeking support from the French businessman, 49.
“In the filing, it says the child ‘was born out of wedlock to [petitioner] Linda Evangelista, 46, and that [Pinault] acknowledged [her] allegation,’ ” a source familiar with the filing tells PEOPLE. “It says, ‘It is decided that Pinault is the father of [Evangelista’s son], Augustin James.’ ”