Plus, the orgasmic-lite feeling she gets from touching the orb likely ties into that succubi book she’d talked about in the season premiere.
Other than that, she’s mostly just shown with her increasingly memory-blocked family, as well as the moments where she’s under the water in her bathtub; and in those, it’s not even easy to tell if she’s being purposefully held underwater or if she’s just having a bath.
As far as the shared nightmare goes between director of photography Isaac Bauman and artist Sarah Sitkin — she’s the one who created those awesome burst-open busts inside the House’s Room 1 — I’m of the assumption that’s where the visual idea of the orb itself came from, since there’s not much about what we see of Jules’ backstory that seems extremely out of the ordinary.