You trick her into thinking it was a one night stand and stall for time.

You gently wake Shelly up. She smiles wide when she sees you, but you put your hand over her mouth before she can say anything. You lead her into the living room and shut the door to avoid disturbing Katie. Then you go back into the room and close the blinds, hoping that the un-collared girl will sleep a few more hours.

When you return to the living room Shelly asks, “Are we going to fuck some more now? I woke up really horny!”

“Not yet, we've got to talk about something. You want to continue being my fuck slut forever, right?”

“Definitely!” The naked girl's large breasts jiggle as she nods yes excitedly.

“Well, it's really important that Katie want to be my fuck slut, too. However, she's forgotten all about last night.”

“Oh no! That's horrible!”

“Oh yeah, it is. But if we can just keep her busy until...” You think back to when was the last time you made a wish affecting Shelly and add 24 hours, “9 o'clock tonight, then we can take the collar off you safely, put it on her, and fix everything up.”

“Okay,” says Shelly. “What do we do?”

You explain your plan.

Katie sleeps until noon. She wakes up confused, not recognizing your bedroom. Not finding her own clothes, she pulls on one of your t-shirts. She leaves the bedroom to find you on the couch, holding Shelly's breasts as the small girl sits in your lap and bounces wildly on your cock.

“Raven!” Katie yells. “What the hell are you doing!?”

“Sorry!” says Shelly without slowing down. “We didn't want to start without you, but you were sleeping super late and we were getting really horny. Plus, you got the most cock loving last night, so I didn't think you'd mind me having an extra turn.”

Katie looks incredibly confused. She walks over to the couch. Shelly slows down the pace of the fucking, but she doesn't stop. Instead she reaches up and pulls Katie's head down for a kiss. The three of you continue your mutual fondling for a long time. When Shelly finally lets go, Katie looks more confused than before.

“Nice. I'm glad you finally got the rum taste out of your mouth,” says Shelly. “You drank so much last night, I wouldn't be surprised if you can't remember anything.”

“Um, no, I remember,” says Katie, as she tries to taste the inside of her mouth for ****. “It was... um.. really fun.”

She sits in a chair to the side and watches the two of you fuck. Taking this as a sign of success, you pull Shelly down for a kiss. She kisses you back deeply, then lifts up enough to press her breasts into your face. You kiss and lick her nipples as she continues rubbing her pussy on the head of your cock.

Soon you both feel the need to pick up the pace again. You keep one hand on her full breast while grabbing her thigh with the other hand for support.

“Oh god, Katie!” yells Shelly. “You were right! His cock is incredible! No wonder you were hogging it all last night!”

Katie's confusion is quickly turning to fascination. She watches as Shelly bucks harder and harder on your cock, then comes to a rigid halt and screams as the two of you orgasm.

“So.. uh... now what?” asks Katie.