Take a deep breath, because you’re about to introduce your brain to information that will exhaust you mentally, emotionally, and perhaps even physically. As you may already know, we live on the same planet as two people engaged in one of the most chaotic open relationships of all time: YouTubers Jake Paul, 22, and Tana Mongeau, 21. When the “celebrities” started “dating” in April of this year, many people suspected that their relationship was a sham — a last-ditch attempt to maintain relevance. Then, they got engaged two months later; then, after another month, they got married in an unofficial ceremony that will go down in history as one of the most raucous of our time, all the while maintaining their commitment to non-monogamy. And now, we have a new official development.

According to Refinery 29, a brave individual has entered the YouTubers’ relationship: Noah Cyrus, the 19-year-old sister of Miley Cyrus. Yesterday, Mongeau posted a video to her YouTube channel titled, “i took my girlfriend’s phone and flirted with my best friend. prank????,” in which she can be seen sending messages from Cyrus’s phone, pretending to be her.

The video comes after months of speculation that Cyrus and Mongeau are dating: As early as September, when the two started appearing frequently on each other’s social media channels, rumors started to swirl that they were more than just friends. Over time, the evidence mounted, culminating in a YouTube fan asking Mongeau “how good” Cyrus was in bed last month. Mongeau, not one for subtlety, responded, “very!”

And to think, just this past May, Cyrus and Mongeau were on the brink of becoming embroiled in a major feud over their shared ex, Lil Xan.

How tired are you?