Gonna be curious to see what Rian's mom (...we haven't met her at all yet, right?) has to say to Rian and Philomela.
This is probably too melodramatic a guess - especially for this early in the arc - but it would be funny if she's trying to force them into an arranged marriage. I thought it was kind of odd for the Scrimgeours to just adopt Philomela out of charity. You certainly get the impression that the Scrimgeours are less insane than the likes of the Sargants or the Rickenbackers, sure, but the general vibe all through the College arc was that none of the adults are altogether Okay, they're all caught up in rat races of power and status. Wouldn't really expect them to pick up another mouth to feed out of the goodness of their heart, but if there's Bloodline Fuckery involved, that would change the calculus a bit.