Salma Hayek celebrates stepdaughter Mathilde Pinault's 23rd birthday with heartfelt Instagram post.

Hayek shares photos of her and Mathilde on a boat, along with a sweet image of Mathilde with her father, François-Henri Pinault.

Mathilde became Hayek's stepdaughter after her marriage to François-Henri Pinault in 2009.

François-Henri Pinault has children from previous marriages with Dorothée Lepère and Linda Evangelista.

Hayek and Pinault have a daughter together named Valentina, born in 2007.

Mathilde praises Hayek for helping her in "everyday life" and teaching her to prioritize.

Mathilde praises Hayek for helping her in "everyday life" and teaching her to prioritize.

Hayek highlights the importance of conflict resolution in her marriage to Pinault, focusing on problem-solving rather than blame.