You don't have to-- surprised Lorcan into staring at Corrie again, even after she'd moved on to a joke. He thought she was talking about splitting the room, then he wasn't sure, then he decided it was just another move in the dance of excusing what they each knew was going to happen.
Amused again, though with less jocularity and more wryness, he asked, "Should I make half a room?" Walls were walls, whether they were made of wood and plaster from floor to ceiling or something less substantial but equally effective. "I could hang a hammock from the ceiling?"