I'm fairly sure that part is meant to indicate what he meant when saying that ("watch over your studies", rather than just watching over her in a general/protective sense). The "-r studies" attaches directly into the non parenthetical sentence, it isn't it's own thing, he also probably wasn't saying that part out loudWhatever -R studies are, I was trying to think of what it could be, not sexual education, not CPR too many letters.