In honor of Tristan's 32nd birthday, The Kardashians star shouted out the NBA player and shared a new photo of their baby boy, whose face had yet to be revealed to the public until now.
The photo showed Tristan with his arms around his and Khloe's 4-year-old daughter True and Tristan's 6-year-old son Prince, who he shares with ex Jordan Craig, looking lovingly at the baby boy while they all sat on a couch together.
"Happy birthday @realtristan13 You are truly the best father, brother & uncle," she wrote on Instagram March 13. "Your love, attention, silly dances, hugs, carpool rides, bed time rituals, the way u show up for them. All of the above means more than you'll ever know to your family of littles."
Khloe continued by noting what she hopes for Tristan as he enters this next chapter, while also mentioning his mother Andrea Thompson, who passed away in January.
"My birthday wish for u is that u continue to crave change, healing, and transformation," she added. "Be strong, be kind, be patient, be free. Continue to Make your soul and your mommy proud. Happy birthday baby daddy."
A source close to Khloe shared with E! News that their baby boy was conceived via surrogate "before it was revealed to Khloe and the public that Tristan was having a baby with someone else" in December 2021, when Tristan fathered a baby boy, Theo, with Maralee Nichols.
After Tristan and Khloe welcomed their second child together, a source close to the couple told E! News in September 2022 that they were "not on speaking terms," unless the conversation involved "coordinating for the kids."
Since then, the exes have been spotted a few times together at recent family gatherings. Following his mother's passing, a separate source told E! News that Khloe traveled home with Tristan to Toronto "to comfort and help him navigate what will be a very difficult time." She, her mother Kris Jenner and sister Kim Kardashian were later seen at his mom's funeral.