Jeez people, it ain't that deep: For various reasons L&P has written in-game and apparently on direct messages to Patreons different ages for the disciple characters, depending on the context of the question and who is asking.
Discussion of the characters' ages, or the legality of these actions in San Alejo or the illegality of owning such content in the real world are completely irrelevant. What matters is the artist's intent.
L&P wanted to provide us with the opportunity to watch Sophia rub the cocks of early-pubescent boys. The dialogue from the boys, the way Sophia talks to them and the way she thinks about them in her monologue and the way she rationalizes her actions (it does not occur to her that these boys are motivated by a conscious sexual impulse, for example, because in her mind they aren't quite old enough to have reached that stage of development), never mind how their mother regards them, are all intentional from the developer and deliberately intended to make us understand that these boys are young. Really young. Like, ew, gross, kinda young. To suggest otherwise is completely dishonest.