I am excited to announce that I am back in @si_swimsuit. I figured with my gorgeous daughters @alexarayjoel and @sailorbrinkleycook by my side whose [sic] going to be looking at me!" she wrote in the caption. "Oh and My kids think I walk on water, so let's not mention the apple box concealed just under the surface," she joked. Brinkley used the photoshoot to spread a message about challenging ageism. "Thank you Sports Illustrated for sending the powerful message that good things come in packages of every size and we do not come with an expiration date!" she added. Likewise, the supermodel's daughters also used their SI portraits to spread messages of body-positivity and self-love. Cook, who's often spoken out about self-acceptance on social media, shared a personal story in the caption about overcoming her struggle with body image. "I went from being 'too fat' to 'too thin' to 'too muscular' and I never felt satisfied. My body and I have been through it all. But recently I have been liberated.
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