It does not seem avoidable. Perhaps it's intentional. It seems like a "let's start our relationship fresh with a clean slate" type of thing and could maybe provide more opportunities to get back on the cheating path.
It does indeed seem like a reset of sorts and unavoidable. And even perhaps a bit realistic, even if your Anne is a cheating ho. They are presented at the beginning as a couple that's very much in love, just looking to have fun. So it seems reasonable that even fucks-literally-everything-that-moves-and-bangs-your-father-and-friends-behind-your-back-slut-wife might have a moment where she thinks that things are out of control and maybe they should pull it back, because of the relationship they have(had). Of course my slutty Anne will be able to pull that off for like just a couple days at most before jumping on every dick
I'm hoping that it means Mircom might be returning to the roots of what I think was the most fun parts of the game, when the stakes were much higher. The return of Ryan is a good step, hopefully that means he'll be making more of a return. I also really hope Nicole comes back soon too. A, I just like Nicole a lot (I have thing for girls with short hair like that). B, it adds another "threat" and angle to the relationship, like Ryan and Martin do. Oh yeah, I guess, having Martin return some to add that tension would be good.
While the sex and all of that is really hot, I find it's more enjoyable when there are some stakes like with Ryan, Nicole, Martin, and a few others that have come along. Anne having 4 separate one-off fucks with strangers just on the way to the Starbucks two blocks away isn't as exciting as when there is some sort of connection or tension with the situation.
Edit: I just saw that Mircom had responded to someone's concern about the forced "faithful" in chapter 14. Mircom's response ('...cheating will be back, more than ever!') was also something I was thinking about, but forgot to add into my post: The reset, if done right, can add those stakes and tension I mentioned, because if after that speech, there's cheating, it adds some gravity to the decision. Especially if we get cheating with some of the folks I mentioned like Ryan, Nicole, and Martin.