Well, I've seen someone here asking for theories, and here it goes what might be my combination of theory and what I'd find interesting.
First of all, the best candidate to have sex with Sophia is definitely Sam. From the moment he saw her in this sexy red lingerie, his hormones started rising up and can no longer be stopped. Not to mention the times when things have been getting hotter with him seeing her "by accident" in her underwear from his room, she showing him her nipple areola (that was a huge hormone boost), and so on. In the end, he's a kind of twin soul for her, and sooner or later Sophia will end up recognizing that she can't deny her feelings. Besides, the last update adds an extra tip for this path in form of car, because as of now he will have the chance to take her somewhere and do what couples do in cars (you know what I mean).
Second, Dylan is on his own "race" vs Sam to see "who's going to be the first to have sex with Sophia". I don't know where this is going, but I can think of 2 options:
1. (The boring one) The developer decides to follow with the current line of "Sophia will continue doing things for Dylan for educational purposes". This might give her an excuse, but I find it a little bit too forced and repetitive if they are expected to have sex this way.
2. (The interesting one) Dylan finds a way to blackmail her. Actually there might an interesting perspective if it was her the one pretending to have no other choice but to do as Dylan says, while she's the one almost begging for it (although Dylan didn't know). In this case we could see the darkest sides of both of them, with Dylan blackmailing his own mother to fuck her and Sophia fucking her own son, simple as that.
As someone stated a few posts ago, the Aiden path shouldn't last long. Just by running the numbers, there's no time left in the story for it, and she may have to deal with 2 or 3 more requests at most. She will probably have to come to class with no panties at some point (maybe that's the next one), but she'll find a way to get rid of him. Still, Aiden has sucessfully opened the exhibitionist side of Sophia, but for him that's all.
Mr. Bennet will probably have to jerk himself because I really doubt Sophia accepts his offer. With the help of the other female teacher, Sophia will solve this "problem" in a different way and will be able to forget about him. However, and somehow similar to what's happened with Aiden, he has opened in her the possibility of having an affair, but not with him.
And actually the candidate to have an affair with is Tony Morello (I think this was the name). I believe he won't try to go all the way in as Bennet did, not from the very beginning, even though he may have the chance under the current circumstances, but instead he will try to conquer her slowly. To begin with, I think he will try to "hire her" in some way, either as his personal assintant or working at the casino. In any case, things will take its time, and maybe we can see some sort of romance (and sex) here at the end of the game.
The lesbian part has multiple options, but the two best candidates are probably Alyssa and Claire (the hairdresser). At first one might think about Patricia, but that might be way too obvious and somehow, even though she's a whore, she's used to playing close to the dark side without crossing the line. Anyway, both Alyssa and Claire are middle-aged women who look confident and know what they want, and seem to like women in their own different ways.
Ellie, on the other hand, is just curious. Actually I'd bet more on Ellie having sex with Dylan at some point rather than with Sophia. What might become kind of "dangerous" here is Ellie's new boyfried and the guy who groped Sophia at the club. What will happen when he finds out that Sophia is her mother? We'll see.
Next we have those guys from the museum (I can't remember their names.. Haku, and..). At first they looked like good guys, but it's probably the opposite. The may have some sort of trap prepared for Sophia and Patricia, maybe recording them in some undesired situation, and here we have another opportunity for blackmailing. The may try to pretend to be some anonymous guy from the museum's security team who caught them "doing something", and may force them (actually only Sophia) to do some sort of webcam show, which might start with some nudism but might become something more spicy by adding dildos and this kind of toys (some webcam stuff will show up one way or the other). In fact, it would be great if they sent here a packet with some of this toys in and this old man dropped it by accident at the moment of the delivery. We can imagine how interested he would be to help her in these matters jeje
And last but not least, we have Liam. Although we almost don't see him, I think he deserves the chance to enjoy the party. How about him getting home and finding Sophia in the middle of a lesbian scene in their room? Could we have a threesome here?
Regards