He had introduced the flashback to justify things accelerating.
At the moment, if you play the story from zero like a newcommer, it makes no sense most of the things she is probable going to do in 3/4 day games like hotwifing, cuckolding, bbc ing, incesting, etc... She was 16 days ago a conservative mother scared to show up with a bikini, and now she is about to have sex with kids, thugs, mafia bosses, janitors, her husband boss, too much of a jump.
The flashback makes no sense. A girl who fucked proactively her friend's father and possed naked for a bikini magazine, is not afraid to show a boob in a small private sauna where everybody is fully naked, for example...
This update woman is not Sophia, the writter had fundamentally changed the character. Im confused now, I feel like I don't know her anymore and I've lost almost all empathy for her. To be fair, I feel right now like she is a fraud, instead of feeling like protecting her from events, I feel like throwing her on every posible shit.
That flashback is a cheap writting trick to accelerate and justify things. So from now on, I would expect this novel instead of being "the slow one with true writting" into a "compressed collection of brazzer porn clips". So for the impatients, I'm guessing your time is getting close.