Personally, I'd freak out if I'm pressed like that as well, with the sister thing he at least know they are in good relationship and are in the privacy of their home.Yeah, he's so weak willed that being forced to make a choice like that finally broke him and he decided to pretend that studying was more important in that moment instead. Lets not pretend he learned anything or grew as a person. He just found an escape route and took it.
Lol, that was unexpected.
But who are those tits in a shirt that told them to go home?