This is a nice exploration of the way Olivia sees John and Peter, how she knows everything about John but he unsettles her, how she knows very little about Peter but he's what makes her feel grounded.

This part especially:
Because the thing is: she's always trusted him. Despite that smirking sweetheart that made her want to knee him in the balls the first time they met. And the not my problem attitude that wasn't all that hard to see through. And the rogue boy-genius facade he still sometimes likes to hide behind. Beneath all that, she knows there's something else, something as solid as bedrock. She knows him, if not his details.
is exactly what I mean. A great read, thanks!