MC is conveniently stupid about stuff like that, he should have put two and two together multiple times during the story. I mean why hasn't he already told Maya the entirety of what he knows about Quinn? No one knows, just plot convenience.
The more we advance with the story, the more annoyed I get with the limitations of DPC's writing, don't even get me started with him needing the plot of the house to happen and retroactively ruin Jill in the process, making the picnic the most important factor in her path. Or making that choice a Chick choice because Jill is a Chick, well, chick. Doesn't matter that the Chick choice should be taking care of the sick friend, but it is what it is, I just enjoy the ride and cross my fingers we survive the landing, at this point.