The 22-year-old reality star has thrown shade at Richie before, namely because she is dating Scott Disick, the ex of Jenner's half-sister, Kourtney Kardashian.
While Kardashian hasn't fully made her feelings known about her 34-year-old ex's much younger girlfriend, Jenner isn't holding back. After a fan account posted several paparazzi photos of Disick out with Richie and his three kids, Jenner commented with a stab at Richie's age.
"Awww Scott and his kids," she wrote, alongside a laughing emoji.
For more on Disick's budding relationship with Richie, watch the video below.