But they are. Izzy's mom implied more than once that Alex's mom took Boris away from her (in front of MC!). Boris himself implied that Izzy's mom was his lover. There is no way that the MC didn't guess.
Come on! WTF
		
		
	 
Sorry I missed this. So the problem is that you want to give the player clues, that is not too obvious to the characters in the game but obvious enough for the player to deduct. This is a difficult thing to do, as if you make this too difficult, the average player can not work this out for himself, but too obvious and the story would not make sense that no character in the story could put two and two together.
However, in this instance, the phrase "Sister from another mother" is not actually a clue, but a common english expression for 2 non siblings, being very close.
(It might also have been used to put though in the player's mind, but it's not referring to any relationship between the two).
The more common phrase "brother from another mother " is more common, since it rhymes nicely.
I agree that the clues were on the obvious side, that's why I called it "The games worst kept secret"
Apologies for brining up old hat stuff
