The succubus smiled again as she sensed Niarra's arousal.  She wasn't sure if seeing her friend violated like this would have such an effect on her, but now that it was, she wanted to nurture that as much as possible.  "Mm, I think your friend is enjoying it...  Don't speak, but put on as much of a show as you can," she whispered, letting the magic of her words sink in to Lyla's mind.  As soon as she was done, she withdrew her hand from Lyla's breast and kissed her palm before blowing on it towards Niarra.  A pink heart-shaped mist quickly drifted from her hand to the elf, and with it another suggestion spell: keep watching, relax, and enjoy the show.