Well not directly, but it was one scene where Vargas did something sexual with Luna and the Mc found it hot, although he didn't knew it was Luna, think it was the scene where Vargas showed Aiden the titjob. Might maybe felt double meaning and i took it wrong, but it felt somewhat Aiden might liked that Luna did that.She's not cheating at all for now, I suggest rereading the game.
"so from that point it should been enough to work their way up to get access to the labs and find a cure"
How can they work their way up without getting closer to Vargas? Even if he doesn’t know about the chems, and he could easily lie about it, since they’re new and he might prefer to keep things hidden, if the cure is in another boss’s hands and they don’t know the location, the only real option is to avoid being stuck with random street missions and stay close to Vargas, where they might overhear something about the other bosses.
When Luna gave him the cold shoulder, they saw what happened, he just assigned them patrol duties or random missions, where they couldn’t gather any useful info about the cure. For all we know, she might start cheating in the next episode, but for now she hasn’t. And getting close to Vargas is still the only real way to get information about the cure and the rest of Nox's whereabouts.
What line? Read the game three times and Aiden never said that. I'm pretty sure he'd go insane if he saw Luna with Vargas
And about the cheating part, so far none the scenes where Luna did something sexual with Vargas, felt really forced, okay she doesn't like it and keep still thinking about the mc, but to me doing any form of sexual act with another without the partner knows, or knows why is cheating. She does it to find out eventualy where the cure could be for Aiden. But she should have told Aiden she would do that and to find the cure, she should have been honest to him, she isn't.
