The 45-year-old was spotted out and about on Thursday, April 9, with "Kourtney" inked on top of a previous piece above his left nipple.
While this tat may be a more obvious sign of their love, fans are not convinced that this is the only one he got in honor of the Keeping up with the Kardashians star.
Last month, Barker shared an Instagram video in which he tattooed the words "You're So Cool!," a Hans Zimmer track from the 1993 Quentin Tarantino film True Romance, on himself.
The font of the tattoo is very similar to a note on a napkin from the Beverly Ambassador Hotel, a location featured in the movie, which he shared to his Instagram Story. How Kourtney ties in? Many think that the lyrics on the napkin were actually written by Kardashian!
The pair seem to be inseparable after they went Instagram official on Valentine’s Day, and Kardashian shared photos from their vacay to Deer Valley, Utah, on Instagram earlier this week.
In one photo, the 41-year-old posed on a snowmobile with Barker’s daughter Alabama Luella, 15, and Atiana De La Hoya, who is the daughter of Barker's ex-wife Shanna Moakler.
Barker shared a video of him cozying up with his new love by a fire pit. "Real is rare 🖤," he captioned the sweet post.
The pair were suspected to be an item in January when they were spotted in Palm Springs, Calif., together, but have been friends for several years now. "Travis has been in the Kardashians' inner circle for many years now, and he's always had a soft spot for Kourtney — and vice versa," an insider told OK! about what took them so long to start dating.
"It never felt right for them to date or hook up until now, mainly because they were scared it might mess up their friendship," the source explained. "But the chemistry has always been there. And finally, they've decided to give this a go, have as much fun as possible and see where it takes them."
Now Barker is even said to have moved some of his stuff into Kardashain’s home. "It's an easy transition since he also lives in the neighborhood. Everyone's convinced they'll be living together full-time before you know it!" a source previously spilled to OK!.
"I'm spending time with a woman who's a great mom, who's a great friend and you don't have to worry about any of those things," Barker gushed on The Drew Barrymore Show last month. "It just comes natural — it's like a maturity thing."