IDK about Christian, but i think for both spouses, the end will be bitter. Even if Hutch gets some consolation, realistically, what he has been through will take a big toll on him. For Vivian, like i said before, it wouldn't make sense if she goes scott free from the events. I try not to take a moral stance and saying she will have to pay, but it wouldn't make sense if she didn't face consequences for her actions. I imagine something like this :
Ch 2 : After the shock of the last events, she will connect with Christian. He will give her pleasures she hadn't experienced and corrupt her. She will get accustomed to these experiences and maybe think she can keep all elements of her life together. ( Flashback of the first night). Maybe still expressing some form of guilt. Hutch suffers in silence and may need someone to express his feelings. Someone who is some form of light in the shark tank which is his job.
Ch 3 : She's getting way too comfortable with the arrangement. She is progressively more dissmissive of her husband's feelings and doesnt hesitate to fuck Chrisitian during a work related event. After the deed, they are introduced to new people (the mayor ?) who may have understood what was going on. Chrsitian sends her a dress and an address. She's used by someone (still the mayor ?). The guy doesn't care about her husband and uses her all night. She is lifted the morning by someone she knows (Marcel ?). Meanwhile Hutch is fed up by his wife, tries everything to find comfort, confides more and more to Addison and she confesses he attracts her. He doesnt know what do with it. The morning Vivian comes back, she begs him to stop "the project" and to start their old life again. The fool still loves her wife and says yes.
Ch 4 : People talk. Marcel uses what he knows this to his advantage. He brags about it to someone of his family, the mechanic, who blackmails her , he will make sure the whole town knows. Vivian gets insane pleasure even if it destroys her self esteem. The rumour spreads between the youth of her town and here come the twins. Fuck us or we tell Sawyer. Sawyer stumbles upon them and Sawyer says 'You're not my mother anymore. Don't contact me. Sawyer goes to his father (i hope he won't find Addison and his father fucking). That was the last straw for Hutch. She comes back to find in front of her house her things packed and Hutch saying he knows and she will hear from his lawyer. Addison has made sure to transmit to authorities proof that her uncle has coerced many women into having sex and is condemned for this. Will learn to be a bitch, prison is not sweet for sex offenders. Hutch breaks up with Addison saying that from now on he must take care of his son. Moves out. THE END