After spending a few months in Cleveland, Ohio -- where Tristan plays basketball for the Cavaliers and where their 4-month-old daughter, True, was born -- Khloe and her NBA star beau returned back to her home in Los Angeles in June, where they've been making the most of the season together.
Before fall officially arrives, ET's breaking down all the best moments from Khloe, Tristan and True's summer together.
"Khloe has been enjoying being back in L.A. for the summer, and around her family," a source tells ET, adding that the two are "doing really well" since rebuilding their relationship after Tristan allegedly cheated on Khloe with multiple women while she was pregnant with their baby girl.
"At the end of the day, Khloe is a strong woman who thinks everything through," the source says. "Once she decided to stay with Tristan, there was no turning back."
No turning back, indeed! Over the past few months, Khloe, 34, and Tristan, 27, have been spending plenty of much-needed alone time together. Just three weeks ago, they were spotted packing on the PDA during a romantic getaway in Puerto Vallarta, Mexico, a refreshing step back from the hustle and bustle of city life in L.A.
A few days later, however, the lovebirds were already back in the Golden State, enjoying a dinner date at Craig's in West Hollywood. The two dressed to impress for their parents' night out, with Khloe showing off her slimmed-down, post-baby body in a sexy Versace number.
When the two weren't hanging out one-on-one this summer, they were almost always surrounded by Khloe's famous family. Tristan not only had to gain back Khloe's trust, but he had to work hard to win over her sisters, especially Kim Kardashian West, whom he blocked on Instagram at one point.
"It did take time for the family to trust Tristan again, but the family supports Khloe and her choice to stay with Tristan," a source said. "At the end of the day, the Kardashians/Jenners are all about family."
Kim seemingly started giving Tristan another chance in late June, after the athlete unblocked her at Khloe's birthday bash. "All right guys, so, what do you think? It's Khloe's birthday, do you think I should ask this guy to unblock me?" Kim asked her fans in a video posted to her Instagram Story at the time.
"For Khloe's birthday, I think it's only right," Tristan replied.
Since then, there's been plenty of bonding time with the new babies in the family. In addition to True, Kim and her husband, Kanye West, welcomed their third child, baby girl Chicago, in January, while Kylie Jenner gave birth to daughter Stormi with boyfriend Travis Scott one month later.
"It's been a great summer with many additions to the family," a source tells ET. "The family is happiest when they are all together."
Khloe's mini-me recently looked adorable while hanging out with her older cousin, Penelope. The 6-year-old daughter of Kourtney Kardashian and Scott Disick put her photography skills to test, snapping pics of baby True that Khloe later shared to Instagram:
True has also been spending some quality time with her 1-year-old half-brother, Prince, whom Tristan shares with his ex-girlfriend, Jordan Craig. The proud dad looked as happy as ever, in a series of sweet snaps he shared via social media in June.
Ever since Khloe and Tristan welcomed True into the world, she's been showered with plenty of love from both her mom and dad, as well as family and friends. Here she is adorably posing in her new Bentley truck from "Auntie Kimora."