Where else would Olympic swimmer Michael Phelps spend his first day of retirement but in the pool? The 31-year-old gold medalist wasn’t doing any laps against competitors, but spending some quality time with his son Boomer and fiancée, Nicole Johnson.

Phelps took to Instagram Wednesday to share with fans how he was enjoying retired life, posting a photo of him hanging out in a pool with baby Boomer in his arms. Johnson was also in the photo smiling at their 3-month-old son. “There’s nothing like being back home!! Great way to spend my first day in retirement,” he captioned the sweet family photo.

Johnson seems to also be looking forward to some downtime now that Phelps is done competing in the 2016 Rio Olympics. The 31-year-old former Miss California shared an adorable picture of Phelps holding Boomer in his lap, writing: “So excited to spend a lil r&r with these 2. #mymen.”

Phelps announced his retirement — again — on Monday telling Matt Lauer on the “Today Show” that he was “done, done, done” and this time he means it. “I wanted to come back and finish my career how I wanted and this was the cherry on top of the cake,” he explained. “I’m done. I’m finished. I’m retired. I’m done. No more.”

He continued: “Between now and London, I was so much more emotional during these Games; I think that showed at times on camera. That’s the difference. Because I knew this was the last time. I knew this was the last race that I ever had, the last Olympics that I ever had. And everything just really hit hard.”

Phelps initially said he was retiring in 2012 after the London Olympics but he started training for Rio in 2014. Even though Phelps says he’s done with the sport, his teammate Ryan Lochte isn’t so sure Phelps is ready to say goodbye. “I guarantee he will be there,” Lochte told Lauer last week (via Us Weekly). “I think so, I really think so. Michael, I’ll see you in Tokyo.”

Michael Phelps retirement Michael Phelps enjoyed his first day of retirement with his son Boomer and fiancée, Nicole Johnson. Pictured: Phelps at an Omega promotional event in Rio de Janeiro, Brazil, on Aug. 15, 2016. Photo: Getty Images