While I don't know abut Larry being the "peak" of the filthy route build up, it's true that we're getting "close" to some sort of release. We know that on Day 19 (or so) there will be some sort of extra-martial sex. Since we're on Day 12 that puts us about a week away (there is some dispute on what day things will happen, so let's just assume somewhere between Day 16 and Day 19). Now, very rarely does someone cheat out of the blue, more likely they have been thinking about it for some time. It would make sense to me that if Sophia is going to cheat on Day 19, she is going to start getting the temptation to actually cheat days earlier. That temptation won't be expressed as her saying "Oh, I shouldn't have done ______, why did I do that?" Instead, it will be expressed by her as "I think I want to do ______." She'll then ponder over that for a couple of days before finally pulling the trigger.
The point is, we're getting into that window. And while everyone here knows that it's going to take years...and years...and years for the game to reach Day 19, the in-universe timeline is getting pretty short. If Sophia is going to cheat sometime in the next week, she's got to fantasizing about it sometime soon. So while I don't think Aiden's next task is going to be what pushes her over the edge, I do think it could be Sam's concert at the end of Day 12. Either way, I do think we're getting close to Sophia developing some deep cracks that will eventually break open.