Fenris' breath catches at Kirk's ministrations, and for a moment he drops his head to Kirk's shoulder, shifting into his touch. He presses a kiss, then a light nip to Kirk's skin in retaliation, before he shifts his hand lower.

He takes Kirk's cock in hand, his own fingers running up and down the length of it. Eventually, his thumb comes to the tip, running lazy circles over it as his fingers continue to work the rest.

"I wouldn't dare."