It’s Chapter 18 of The Architect’s Guardian! This was one of my favorites to write. Here’s just a bit:
Armando reached again for the light and, again, Izdahl stopped him. This time he pinned Armando’s hands to his side. The ease with which he did it was unnerving. Armando knew Izdahl was considerably stronger than him but it was rare that his lover casually displayed that. Izdahl’s next words didn’t help to ease the apprehension Armando was feeling. There was a roughness to his lover’s voice that Armando had not previously heard.