When have we had sex with them? we've been close but we haven't gone the whole way yet with either.
This seems to come down to a Clintonian hair splitting exercise on just what counts as sex. (Assuming the MC makes the proper choices, of course.)
The MC starts intercourse with Josy, but is interrupted by her parents before completion. The MC tries to have intercourse with Maya, but only gets the tip of his penis in before they decide to call it off and try again later.
Do those count as sex? Dirty old scholars can debate it, I suppose. The MC will summarize the situation as having had sex with Josy and "pretty much" having sex with Maya. I'd say that's close enough for our purposes.
Do you remember this text as well?
I think the message is clear. MC will not have sex with them just because of the scavenger hunt. We can speculate whether they will do something on the "more than friends" path without faking (I think they will not). But any threesome will be much, much later.
I wonder if there might be a branching decision on just how much of the scavenger hunt is faked if the MC does help them (either as a direct player choice, or as a result of choices in prior chapters)? It could add some good gameplay elements to the story.