I like where you're going with this but I think it needs adjustments to be more plausible, because as everybody knows: verisimilitude is extremely important in porn games!
While Ophelia is obviously a dominant personality in the household and that would correlate to being an authority figure like a principal, she doesn't have the necessary education or credentials for such a job. The obvious path is for Ophelia to enroll in college alongside Sterling, which sets her up for growth and potential romantic conflict.
Brenna is currently in college (I think?), so having her as a peer/upperclassman to Ophelia and Sterling could be an interesting dynamic, very much a role-reversal compared to their household situation.
Aliza is already a high school teacher, but perhaps she could switch to teaching college, or even as an additional job to her current one?
I don't think we know what Mallory's professional background is (if any?). With how she presents herself as polished and refined, I could maybe see her in the principal job.
Also, a college setting might be inconsistent with the theme of this game. The titular "power vacuum" comes from the loss of the male head-of-household, with Sterling and Hunter competing to become the new one. Presumably in college there would be too many males i.e. too many threats for Sterling to thwart? Unless it was an all-girls school, in which case you'd need to contrive some reason for Sterling to be there?