Sally tries on a smile. She knows Darren doesn't like her. "Do I know her?"

Greg snorts.

"Yes," Darren says again. "You knew him."

She's confused until he holds his hand up, giving her silent permission to look. His body is tense, warning her to be cautious about her response. And when she finally makes out what the mark is, she stops breathing and just stares.

It's two letters.

TS