Christie Brinkley

Fishing for compliments? Proud mom Christie Brinkley shared some gorgeous shots via Instagram of daughter Alexa, 27, and son Jack, 18, from their family fishing excursion in the Hamptons on Aug. 15.

"It's no fluke that we're having fun… Cause were together on the water!" the supermodel captioned one photo, which showed mother and daughter smiling for the camera in halter bikinis. While Alexa posed in a white two-piece, Brinkley -- who graced three consecutive covers of Sports Illustrated's Swimsuit Issue in the '80s -- paired her navy and white striped bikini top with modest navy shorts.