Oh my, a major. You don't see her running around that often. I'll admit that I'm very interested in CR here, but I suspect that the two of them have little reason to have crossed paths just yet. AU Chloe is generally quite legal (aside from using fake IDs to sneak into clubs) and legit and works as a florist at a flower shop right now. This, on top of about a 12 year age difference makes it a bit unlikely that they'd know each other beforehand, unless they've run into each other socially very recently (It'd likely be the last six months or so, possibly even within the span of the game).

Maybe Mariko was someone Chloe once asked "So, do you remember horses?" in a bar one night, but when the question got an odd 'no, what the hell are you talking about?' she dropped it and just tried to chat the older woman up normally.