She's had time to practice with it—the tail. While she hates to admit it, the Hellburbia experiment gave her the opportunity to get used to it and see what it could do without shame, and a part of her kept that.

Maybe more of her than just her tail held onto the lessons of Hellburbia.

She's certainly shameless as she responds to Jack's kiss. She could blame the aphrodisiacs, but at least for now she doesn't. For now she kisses him deeply, wrapping her arms around him, her nails already digging into his back.