Okay, Drakel, lemme take a cherry picked quote from your long post to emphasize why your claims are ridiculous and baseless.

[quote=Drakel]
if they truly were ... as the OP states.[/quote]

You're assuming that the GM, whose purpose is to deceive the players, is giving everything to you straight. Ever heard of the unreliable narrator trope? That could absolutely be in play, especially since the entire post was from the point of view of the character Shy and he could have been reading into things very incorrectly. Alternatively, things could appear one way on the surface but be very different elsewhere. The relationship between you and Squee could be a loveless shell of a marriage. The relationship between me and Nat could be a recent and shallow thing wherein we truly know nothing of each other. The brothers could appear to be proud but have a lot of deep-seated resentment and jealousy. And finally, I reiterate that the GM's purpose is to fuck with us and deceive us, and that alone should be enough to discount any notions of love between characters freeing them from suspicion, because that would be playing into the hands of both Shy and the killer. The fact that these pairs are coming into the game as pairs means absolutely nothing in a game of Rabbit Doubt.