hold me fast, fear me not (слэш)

The Yiling Patriarch hummed. "You would like some of my plants?" he asked. 
A rhetorical question, of course. Lan Wangji gave him a small nod.
"I would," he said.
"I see!" The Patriarch's thumb brushed against the edge of Lan Wangji's jaw. His fingers curved around the back of Lan Wangji's neck. "But surely you are willing to pay for what you've stolen."
Lan Wangji resisted the urge to moisten his lips, but he allowed himself to swallow. The Patriarch's eyes locked onto his throat.
"What does the Patriarch ask as payment?"
(In which Wei Ying is Tam Lin, Lan Zhan is Janet, and they must both fight their way to freedom.)