Invite her over

You guess that she is too shy to move, so you motion for her to join you and Katherine, then put your finger to your lips to make sure she stays quiet. She comes and kneels beside the bed, watching Katherine intensely.

You point to Katherine's engorged nipple and the girl nods. She leans over and lightly licks Katherine's nipple with her pink tongue. Not yet realizing that the tongue isn’t coming from you, Katherine moans deeply as the girl sucks the nipple into her mouth. You watch as the Goth’s hand disappears under her the hem of her dress and up between her legs.

Katherine shudders forcefully on the vibrator as she starts to cum, wailing for the pair of you to hear. "Oh my God! Yes! Ugh! I’m Cumming! God! Uh! Uh! Uuurrrhhhh!” screams Katherine and her eyes pop open as her orgasm washes over her.

She is momentarily startled to see the Goth girl sucking her nipple, but then another wave overtakes her as she reaches up and pulls the girl's head tight to her breast as you remove the vibrator from her cunt.

You say once Kat as finished cumming, "Someone decided that you were too hot to miss, Katherine. What's your name?"

"I'm Mary. I didn't want to intrude on you guys, I just couldn't help watching. That was one of the hottest things I have ever seen." She is still rubbing herself vigorously under her dress, obviously very turned on by the show and hopefully eager for an orgasm of her own. Katherine has since closed her eyes in post-orgasmic bliss.

With a sly grin on your face, you say, "Well, Mary, would you like to feel what this thing is like," gesturing with the purple vibrator, "or would you like the real thing?"

Will Katherine allow you to move onto the Gothic girl while she recovers?