Kendall Jenner and Blake Griffin are still together, but their romance is "cooling off."

The Los Angeles Clippers player, 28, was spotted with a mystery brunette woman over the weekend at the upscale Soho Malibu, which prompted rumors to question his relationship with the "Keeping Up With the Kardashians" star. At about the same time, Jenner, 22, flew out of L.A. for Milan.

However, a source told People that Griffin and Jenner are still very much together and are not calling it quits just yet. "Blake and Kendall have been cooling off recently, but they’re not officially broken up," the source said.

According to those who saw Griffin and the mystery girl, the pair seems to be in a relationship. They enjoyed dinner and drinks with another couple.

"They were definitely giving off couple vibes," an onlooker said referencing to Griffin and the woman he was with. "At one point, she put her hand in his lap, where he held her hand there for about five to 10 minutes or so."

"It was so subtle. They seemed very low-key together, and their holding hands looked entirely natural. They looked like they were really comfortable with each other, and they were definitely not calling any attention to themselves and the little bit of PDA that they shared," the eyewitness added.

Jenner and Griffin have been rumored to be dating for several months already following his split from his ex-fiancée, Brynn Cameron. Griffin and Cameron broke up in July. They share a 4-year-old son, Ford, and one-year-old daughter, Finley.

When Jenner celebrated her birthday in November, Griffin was among her guests. An insider claimed that the two are already dating.

"They're legit. They're a full-on couple," one insider told Us Weekly. "Kendall has been going to a lot of his games and they have been enjoying time at home when Blake is in town. They're good."

On New Year's Day, Jenner and Griffin were spotted enjoying a romantic dinner date at Nobu in Malibu. The following day, the TV personality was spotted leaving Mastro's Beverly Hills restaurant alone. Jenner was camera shy as she covered her face with her hand and walked towards the car waiting for her.