How is that supposed to work that Sophia "enjoys" tasks actively involved in the Aiden without breaking her will. Corruption alone? Nice idea, but also an immature fantasy.
When I speak of a dominant Sophia I mean something like this. Aiden forces Sophia to do a lap dance in a bar. Aiden puts himself in a position where he believes he is 100% the beneficiary. Sophia also begins with Aiden, does not allow himself to be touched by him, but then continues with a randomly chosen person and allows this person to be touched.
It's not about the whip-wielding dominatrix, it's just about Sophia having to feel like she has to outsmart her blackmailer in order to enjoy the event and to be curious about the next task.
These tasks only have an element of enjoyment & aren't something that she'd voluntarily undertake. People do all kinds of things they don't want to but most are just morale sapping day-to-day actions. [Having said that, even a trip to the Dentist's could contain a tiny element of pleasure in some of the old magazine articles in the waiting room, in the days when there used to be magazines but nobody went there to read old articles]. Breaking someone's will is not the same as making them do a range of tasks. First the person has to be broken, as in a brain-washing programme, then they are re-programmed with a different set of beliefs & values. Aiden's tasks may be undertaken involuntarily but IMO, it would take more than that to break someone's will, especially when Sophia can cling to the thought that it's all been done for her son & his friend. Aiden's tasks are about control. It would be of no advantage to have a mindless zombie, or a gibbering wreck. He needs a fully conscious, (as in fully conscious of what she's having to do), sentient being to get complete satisfaction.
Corruption is not an immature fantasy if you accept that Sophia always had a hidden reserve of sexuality, waiting to be released. I suggest that the story so far has shown this to be the case & that the question is not whether she'll be corrupted but as the subtitle of the game itself suggests, 'how far will she go?' Immature is only applicable to fantasies like time-stopping, mind control, super-hypnosis etc. These I don't ever play, because I'm so mature!
Sophia in a lap-dancing bar is a thought to conjure with but how would she know how to dance in that given way, without training? Given that something like this could occur, there are various potential scenarios arising from any attempt by Sophia to gain a measure of control. Aiden could see it as a challenge to which he could respond in the scene you describe by encouraging the random individual to go further &/or by seeking to involve other members of the audience. He might also react with resentment & produce a more difficult task next time, than what he'd originally planned, informing Sophia of this after she'd completed the onerous activity. He could take it as a positive sign, that Sophia was getting into the spirit of things, despite her refusal to let him touch her & act accordingly. There are more that I can think of but enough for now...
I'm certainly glad that you don't envisage Sophia wielding a whip. Again, the gaming world is chock-full of such characters & Sophia is much too nice.