Honestly this is just my prediction/theory. But he seems to have hyper sexuality caused by assault from the oldest brother. Tbh, the other brother prob saw and did nothing too or blamed him for it as well. And it probably happened again the night of the charity ball originally. I’m surprised ppl are so confused to why the uke is acting this way when it’s clear it’s from trauma. And it’s sad yet interesting to see an author tackle the subject in a real and brutal manner of what can happen after.