"I... I'll never cooperate with one of your kind, demon bitch," the tiefling spat as she struggled.  "I may be part demon, but I can be better than you are."  As Mareth continued to draw the symbols, the tiefling started to blush, and the succubus could tell that she was starting to get aroused.  "I... I don't care what you do, but I'll never give in willingly," she said, though her voice now had far less fire in it.