'Smoking it' doesn't mean much -- she imagines he's going to burn it and they'll get high off the smoke or something, so she's not immediately alarmed when he produces a small flame -- but she begins to understand when he inhales.

But she's not so trusting when the thessyx has a fit, suspiciously taking the thing and throwing a skeptical look Varric's way.

"I've already had my fill of 'coffee.' This had better not taste worse than that."

Tentatively, she tries this 'smoking' thing, but seeing as she has never done it in her life, let alone seen someone else do it, she just gets a lungful of smoke and instantly starts coughing. "By all the gods!" she manages to choke out. "What --"