"Kim made a decision to let Stephanie go," a source told the publication. "She was a good assistant but when Stephanie wanted to transition into a larger role with Kim's brand and businesses, it just didn’t work. Kim gave her the chance but after a short period of time it became clear that Stephanie just didn’t have the knowledge to take on a role like that. Kim made an executive decision to part ways."
The source adds, “She’s still friendly with the other sisters but she and Kim aren’t really speaking.”
In a recent episode of KUWTK, Kourtney Kardashian revealed to Kim that Steph was complaining about being over her job on a night out. Kim responded: "But I do think it’s like inappropriate for her to talk to you and not to me. I mean don’t you think that’s like a little bit unprofessional?"
Though, ultimately, it seems she's realised it was time for the duo to go their separate ways professionally after working together since 2013.
At the moment it seems the decision was somewhat mutual, with both Kim and Steph keeping all their BFF photos on social media.
We can't wait to see what Steph - whose cool-girl style and epic lifestyle have garnered her almost one million Instagram followers - does with her new-found unemployment. After all, Kim moved on from being Paris Hilton's assistant to become one of the world's most recognisable faces.
Stay tuned for more from Steph, we'll be paying very close attention.