I had an idea this morning for a twist in the plot that would put a lot of things in this story in a different context. Up till now I was thinking that the reason Vivian fucked Christian was so that Hutch could keep his job. This is one reason why I found Vivian so unlikable. That is a very stupid reason to betray your husband of 22 years. This new theory not only puts Vivian's actions in a new light, but Christian is also slightly less vicious and sadistic (to be clear, he is still a scumbag). It also makes Hutch a little less sympathetic. The author said the backyard scene is key, and I got the impression there will be unexpected twists.
Imagine the scene in Christian's back yard where he first fucks Vivian. Just before he fucks her, he tells Vivian that Hutch losing the 2 clients was not the real reason he was going to fire Hutch. The real reason he was going to fire Hutch was that Hutch was embezzling money. He tells Vivian, that he used Hutch's loss of 2 clients as an excuse to fire Hutch without revealing the theft. Another possibility could be that he tells Vivian that Hutch's theft is related to why the company lost 2 clients. After this, when Christian saw how pretty Vivian was, he decided to take advantage of the situation.
There are several problems with the above theory, but I will try to address some of them. This is only a theory, and I could be 100% wrong. We will find out in the upcoming updates.
Problem #1, if this was the case, why didn't Christian have Hutch prosecuted, or at least confront him about the theft.
1. Hutch may have mentioned that he had a son in college, and may have given signs the family was struggling financially.
2. Despite Christian being a terrible person, Christian might not be sadistic enough to want to see Hutch go to prison. Maybe there is a shred of humanity in Christian.
3. The amount of money being stolen might be a lot for Hutch and Vivian, but be trivial for a businessman like Christian.
4. If he thought Hutch was stealing to take care of his family, he may have said to himself, "Sometimes people do the wrong thing for the right reasons... out of love." This puts the scene below in new context. If the theory is correct, and it may not be, Christian could also be referring here to Hutch's theft, not just Vivian fucking Christian. I don't think Hutch is aware of the dual reference.
If Hutch was stealing money, this could be a reference to that along with being a reference to Hutch letting Christian keep fucking Vivian. Again, if this is true, I don't think Hutch knows it is a dual reference.
Problem #2, why is Vivian not outraged at Hutch, if he stole money?
1. If Vivian had been pressuring Hutch about money, she might blame herself for Hutch stealing.
2. Vivian might interpret Hutch's stealing as an act of love towards her and their son Sawyer.
3. Given their relationship, if Hutch wanted Sawyer to go to an affordable college, but Vivian wanted him to go to an expensive college, Vivian would get her way.
4. Hutch buying Vivian the expensive car might be an example of him trying to please her with expensive gifts.
5. If the above things are true, that would explain why Vivian is so emotional. It would even explain why she refers to Hutch as, "her poor sweet prince."
Vivian clearly gets her way in the house. It possible the family's financial problems are the result of Hutch giving Vivian what she wants, or what he thinks she wants.
It is possible that what Hutch says in the screenshot below is foreshadowing them getting concrete evidence against Hutch.
Hutch is good with numbers. He might have thought that he was clever enough to syphon off a little bit of money here and there, but never get caught. I could see Christian telling Vivian this right before he fucked her. In this situation, Vivian could have agreed to fuck Christian to avoid Christian going to the authorities, or as payment since Christian did not go to the authorities. If this theory is correct, I could see Christian mentioning that the IT people found further evidence of Hutch embezzling on his computer or in his files.
If Vivian decided to have sex with Christian the first time beyond saving Hutch's his job, and her obvious attraction to Christian, what the reason is hasn't been made clear yet, but this is my attempt to understand what the reason might be. She is obviously still a cheater, and she loves male attention, but if there was something drastic that pushed her over the edge at Christian's house, I think something like this could be it.