Has her try dancing in lamia form.

"Why don't you show me if you can dance in this new form too?" he suggested with a smirk.

"Oh, you want to see your new plaything in action?" she teased as she began to start by swaying her torso side to side, literally by moving her tail to shift it three feet to the right, then six to the left, then six back to the right, at a speed that made her boobs bounce, and meanwhile took her hands off of her head so as to sway her arms around while doing that.

Then she proceeded to twist around so he could see her do it from behind, shaking her transformed ass as she did, before then tilting her body backwards until her hands touched the ground, essentially doing the bridge as she arched her upside down back to jut out her boobs, grinning at him as she wiggled her hips with her new snake tailed flexibility, the vibrations making her tits jiggle as well.

She then rose from her position again, turning back around and touching her palms together above her head as she stood further up on the tail to have the length to move her torso around in a circular manner while at the same time undulating her belly and making her boobs bounce with incredible dexterity.

Then, she repeated the bridging position, this time facing the other way, so her glistening pussy was in view, and she pressed it forward as if to present it to it's new owner, and she resumed shaking her hips to entice him.

He was practically drooling over her erotic form and actions, and was just about ready to go in and take her.