Mum-of-one Khloe failed to raise a smile, despite news Kylie had booted Jordyn out of their shared LA home following the shocking revelations.
It was thought pouty Kylie was torn between her sister and best pal (and co-owner of a cosmetics brand) but sources say she stood firm with Khloe, booting Jordyn out of her $16million mansion
A source told People magazine: "It's been a difficult time and she's broken up about it. She's heading home to be with her mom."
Overnight, Kim Kardashian unfollowed Jordyn - a sign from the OG that the cheating rumours were more than fiction.
Khloe, who forgave Tristan for cheating in November last year before giving birth to True, looked like she wanted to be anywhere else as she posed on the red carpet.
But the Pretty Little Thing ambassador is still a Kardashian and fullfilled her PA like a charm.