"Mm." Kurt ducked his head and had the decency to look a little embarrassed. "It was ... he's nice to sing with, I guess." He didn't know why he was so hurt, why he was so irritated; it was just a song, and he and Sebastian had been together for months.
The thought of singing with Rachel cheered him up a little though, and he seemed to brighten. "Me too. How did anyone get Cooper to agree to sign that waiver? He must be in a lot of trouble."