Ah, gotcha.
Yeah, the tone with Markus being the one to make the video call seems off... So I understand your point.
But Julia does make reference to "talks" she's had with Vika, so Julia seems to "know" already; this scene felt a bit like "show" on the NTS path. And Julia does give updates on the NTS path.
The NTR/cheating path, she didn't give those updates, this scene is skipped (depending on Markus phone call choice) and jumps straight to the security cam scene, which is also the same on NTS & NTR paths.
So, I do get what you're saying. It just felt more "ok" to me on the NTS path because Julia hints at already "knowing" what's going on, and gave updates...