Breakthrough, I assume, is penetrating the other camp, which I see that Ian has done. A number of things happened here, mainly Ian’s interest and skill in music, which desensitized Oliver. Also Oliver “admitted” that he isn’t gay, and then proceeded to give the indication that he really is gay—or at least not fully heterosexual. Oliver is a complex guy who I’m sure Ian will temper. Already he is allowed to call him Ollie, in private of course. No wonder Trevor is confused if he has the same intentions as Ian towards Oliver.
Also, Ian’s interest in Gödel is out of character for him, making him rather complex too.
Looking forward to the next chapter. Thanks.