I'm pretty sure sex with Anne was logically dealt with last update. Despite all her hesitations she decides to let her carnal desires take over. It's been evident from the start that Anne is easily manipulated once you get her excited and that's what Max has been doing for the past 10 or so updates. People complaining "It's too soon" or "It's illogical" haven't spent much time playing the game. It's been abundantly clear that the route Max was gonna take was breaking down her barriers until she was open and willing to have sex with him herself, hell that's what Kira's been doing. Last update solidified this and the update where they had a movie scene where Max ate her out helped plant the idea of sex with Max not being a bad thing in her mind.