I don't think anyone has "Officially" confirmed the Family Dynamic between BadBoyHalo, Sapnap, and now Eryn. it's been hinted at by Eryn that Bad may be his father, what with them both having demon Origins. and we have a minimal understanding that Sapnap was born of fire, found & adopted by BBH.
But their interactions in this scene of the recent Prison Break Lore, Sapnap really invests in the dynamic, warning Eryn to avoid Dream, and being shaken by the number of times Bad was killed during rhe escape.
(Seriously, Sapnap doesn't get enough credit for his acting chops. He always manages to impress me.)
but the best (& reason this clip is on may page) is all their reactions to Sapnap's bad-ass line near the end. straight out of am action movie, and they all immediately knew it.
clip taken from Sapnap's stream. please follow &/or subscribe at: https://www.twitch.tv/sapnap?sr=a