The 42-year-old inked the words "I love you" onto her man in their latest declaration of love.
"I tattoo," the Poosh founder captioned a series of photos and a clip of her with a tattoo gun.
This is not the only ink the 45-year-old got to profess his love for the Keeping up with the Kardashians star. Last month, Barker was spotted out and about with "Kourtney" inked on top of a previous tattoo on his chest, OK! reported at the time.
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Then in February, Barker showed himself tattooing "You're So Cool!" onto his thigh, a nod to a Hans Zimmer track from the 1993 Quentin Tarantino film True Romance. Eagle-eyed fans noticed that the writing was similar to a note he previously shared on his Instagram Story on a napkin from the Beverly Ambassador Hotel and believed it was Kardashian's handwriting.
The lovebirds were speculated to be an item in January after they were seen in Palm Springs, Calif., and then went Instagram official on Valentine's Day. "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," a source previously told OK!.
While they have since regularly been sharing steamy PDA pics online, sources said it is more than just a honeymoon phase. Kardashian thinks "that Travis is the man she's going to share her dreams with," a pal told OK!.
Another insider said that Barker has "been telling everyone he's hit the jackpot with Kourtney," and is even reportedly looking at engagement rings. "He's planning an ultra-romantic proposal," the pal said. "He's still looking for the perfect ring, but that doesn't mean the baby-making has to wait until it's on her finger."