Susan gritted her teeth as Penny gyrated on top of her, gasping as she tried to speak to her friend.
"Penny," she said, "you've got to hold on. Penny! Oh, Jesus, Penny, the more you do this the harder it becomes for me!"
This snapped Penny out of it momentarily, and the orange-haired girl looked down at the face of her indigo companion. A meaningful look was exchanged as their eyes met.
Penny's appearance had gotten worse after they had bound her, evidencing a lightly ridged brow, long, pointed ears, and thick tufts of fur hanging down from her cheeks. Susan wasn't that far behind, due to the temptation that was bound straddling her. The wispy beginnings of her cheek tufts had sprouted, and her heavy breathing showed off her now quite fierce fangs.
"Susan, I'm sorry. The moon is making me want you! Can't you feel it?"
Penny rubbed up against Susan again without thinking, and Susan shivered as she felt the fur of their loins tangle and intertwine. Involuntarily, she bucked her hips a little in response, and moaned. This lost ground immediately played out on her features, as her face caught up to Penny's. Susan could only feel the other changes, as extra nipples budded on her chest, only to meet those on Penny's.
"Well," Susan said with a snarling sigh, "looks like for better or for worse, we're in this together...