Who better to accompany you to your sister’s elaborate marriage proposal than your ex?

When Travis Barker popped the question to Kourtney Kardashian in Montecito, Calif., on Oct. 17, they were surrounded by their beloved family members to help them celebrate. Naturally, mom Kris Jenner and sisters Kim and Khloe Kardashian were there to toast to their love. 

But perhaps the more surprising person on the guest list was Khloe’s plus one, as she attended with her ex, Tristan Thompson.

Khloe and Tristan, who share 3-year-old daughter True, have established a strong friendship following their June split. In fact, they remain on such good terms that fans have wondered if they’ve gotten back together (again), a rumor E! News debunked in August.

Fans have certainly noticed how Tristan has continued to hype up the reality star, telling her last week that he was “proud of your hard work and dedication to your healthcare and fitness.” His Instagram comment also gushed, “You are so motivational Koko.” 

So, where do they stand today? A source exclusively tells E! News that there is “no label” on their relationship as it stands now.