I think people are really overestimating what these tasks are doing to Sophia and what her other Filthy actions in general are doing.
I honestly doubt, very much, that Sophia would, by the end of it, turn into some depraved, cock-hungry slut get gangbanged every night and turning her body into a cum bucket, which seems to be what some people think is going to happen. It's not, I firmly believe that it is not.
What I feel is far more likely is that, despite her reluctance to do these things, despite her prudishness at times, that these things will simply serve to making her feel more desirable, more sexual, and to enjoy that feeling, to embrace it, but to also know when and how to use it. Essentially, I think this will just make her a bit more like Patricia, someone who knows she's sexy and gorgeous, and embraces that belief and confidence in ways that make her feel good and get what she wants, but doesn't go too far with it. Patricia says she only has sex with her husband, and I believe that. She might like to flirt with other guys, make out with her sister, etc, but she won't go too far, and I think that's more likely to be how Sophia will turn out by going down this path.
Sophia will get sexual with some people (Dylan, Ellie, Patricia, Sam, Alyssa, Julia), but that's because she's close with them and already has an established relationship with many of them, but she's not going to go whoring herself out to random guys or girls for some cheap sexual thrill.