As far as Wilhelm is concerned, Chris is the one who decided to wedge himself into his space. If he doesn't like how Wilhelm reacts, then he can go somewhere else.

"I'm not throwing a fit." His voice cuts like a dulled knife. His eyes stab at Chris before returning to the fading rows of rosebushes. He slowly pulls in a breath and releases it. "I'm Wilhelm."

Tipping his head toward the garden, he adds, "This was Kell's. He was my friend."

The clarification is a little pointed. It's too weird to consider Kell in a romantic light when he was more like a brother to Wilhelm. He'd avoided treading the comparison when Kell was here, because brother is a sacred space that only Erik is allowed to occupy. But Kell had been by Wilhelm's side through some of his darkest days, and he wishes he could have told him how much it meant to him.