Kylie Kelce and her daughters are Jason Kelce’s biggest fans!

On Saturday, September 14, the high school hockey coach and wife of Jason posted a touching message of support for her husband on Instagram, acknowledging that a “new chapter” had begun for the now-retired Philadelphia Eagles star as he made his debut with ESPN’s “Monday Night Countdown” team on Monday, September 9.

“Training camp looked a little different this year,” 32-year-old Kylie begins the caption, referring to the fact that the family attended the Eagles’ training camp over the summer, albeit in a different capacity since 36-year-old Jason is no longer a player on the team.

“Watching them at the Linc on Monday will be a little different, too,” she added of Lincoln Financial Field, the Eagles’ home.

“Just know that the girls and I love cheering you on in this new chapter!” she added.

Kylie concluded the caption with a cheeky nod to Jason, who dropped a slightly risqué word on his first show: “…Maybe you should try not saying ‘tits’ this week?” she teased.

Alongside the sweet message, Kylie shared a photo of the couple with their daughters Elliotte, 3, Wyatt, 4, and Bennett, 19 months, at what was apparently the Eagles’ summer training camp.

In the photo, Jason and Kylie grinned with their daughters while the mother of three held her youngest, Bennett, in her arms.

Her husband quickly shared his own sweet message in the comments section of the post, writing in response, “The luckiest man in the world.”

Kylie’s witty comment about Jason using “tits” was in reference to a funny moment during the Monday, September 9, broadcast when the retired NFL star’s wardrobe malfunction was revealed before the San Francisco 49ers took on the New York Jets at Levi’s Stadium in Santa Clarita, California.

During the show, Scott Van Pelt listed Jason’s accomplishments – including co-hosting the hit podcast “New Heights” with his brother Travis Kelce and winning the Super Bowl – before revealing to viewers that Jason was wearing a T-shirt he had purchased at the mall that same day.

“Yet Jason Kelce is wearing a shirt he bought at the mall because he left his duffel bag in the truck,” Van Pelt said.

“Now it fits my stomach. I’ve lost a little weight, but my tits are still a problem,” Jason replied.

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Meanwhile, Kylie spoke to PEOPLE in August about her excitement for Jason’s new role ahead of his debut on ESPN.

“I’m especially excited to see Jason shine in his new position. I joke that it sucks that he’s good at everything, and I know I’m biased, but I really believe he’s good at everything because even if he’s not good or the best at first, he’s going to work endlessly and tirelessly until he can achieve that. So I have complete confidence that he’s going to take on his new position and shine,” she told PEOPLE at the time.

“I’m really excited to watch him do it. And I think it’s a big shift from the physical effort to showcasing the intellectual skills and the way you analyze games,” Kylie continued. “He’s such an analytical person and I think that’s going to be the perfect role for him on Monday night on ESPN. I’m really excited to watch him work.”