Kris Jenner shared a heartbreaking tribute to Tristan Thompson‘s mother Andrea Thompson after she died unexpectedly.

The NBA participant’s mom—who just like the Kardashian-Jenner household matriarch, is a grandmother to his and Khloe Kardashian‘s daughter True Thompson, 4, and their 5-month-old child boy—handed away Jan. 5. Andrea suffered a coronary heart assault at her Toronto residence, TMZ had reported, citing sources with direct information.

“I’m so heartbroken by the sudden passing of Tristan’s mother, Andrea. My ideas, prayers and all of my love are with Tristan, Amari, Dishawn and Daniel,” Kris wrote on her Instagram, naming the basketball star and his brothers.

In her tribute publish, the momager included a number of throwback household photographs exhibiting Andrea with herself, Tristan, Khloe and True. “You had been probably the most superb, devoted, devoted, and selfless mother and such a loving, form, and fabulous grandmother,” Kris wrote. “What a blessing you had been to your loved ones!!! I’ll miss you Andrea. I’ll miss your vibrant spirit and superb mild.”