I think them processing their feelings for each other after Antarctica, and being vulnerable about their feelings for each other could be interesting. The fear/confidence as they find some private time at Brakebills to disrobe (emotionally as well as wardrobe) and have sex again. But not play out the sex. I wonder what Alice would feel, what Quentin would feel. Would he be worried what she thought about his body? It could be interesting.

Aftermath could be interesting too. Do they take a shower together, or does Alice want privacy as she cleans up?