I think it's not a romantic secxal love towards the dad, just a misplaced way of coping with the fact that he feels like he's not a "real son" because of the king's past family. He's just really desperate for familial love. Hence, the parts where he also didn't see Alex as his real brother and then overjoyed to know that they were equally loved by their dad. Bro just tried to find affection in the most slutty way possible tho. He may be smart, but he's clueless about family things since he was an orphan.
I think it's not a romantic secxal love towards the dad, just a misplaced way of coping with the fact that he feels like he's not a "real son" because of the king's past family. He's just really desperate for familial love. Hence, the parts where he also didn't see Alex as his real brother and then overjoyed to know that they were equally loved by their dad. Bro just tried to find affection in the most slutty way possible tho. He may be smart, but he's clueless about family things since he was an orphan.