Move in (of course)

There's no way that you're turning down this invitation! You quickly undo your pants and pull down your boxers.

As you approach, you realize that you haven't been warmed up and neither has Casey. She's a little wet, but not enough to make things the level of comfortable you want.

"I wish that I was lubed up and that Casey was wet and ready for me," you whisper.

Seconds later, you feel a wet sensation go down your cock as it gets lubed up. It felt like a mouth, which was unexpected!

In front of you, a tingle goes through Casey's body as her body produces the necessary fluids. You see her reacting to a different sensation in her mouth too, confirming your thoughts. The wish retroactively changed the recent events to have had her suck your cock!

She doesn't seem to mind and quickly resumes licking Ashley's pussy.

Now ready, you approach with confidence and rub your cock against Casey's exposed pussy. You rub her ass as well, lowering her panties the remainder of the way off in the process.

Confident now, you push your cock into the heiress' hole and start to fill her up. She moans into Ashley's pussy at the new (and fantastic) sensation. Ashley's eyes remain closed as she gets licked, meaning that she still doesn't know what is going on with you two.

You fill the girl up now and start to fuck her. You really wanted this and you made sure to wish that she did too. No harm, no foul, right? Right?

For the next several minutes, you fuck Casey while she has her face buried in Ashley's pussy! Everyone wins.

Ashley is first to reach orgasm, signaling by grabbing Casey's head and grinding it in tighter. She cries out passionately as she reaches orgasm!

It is at that moment that she opens her eyes and sees that you two are fucking.

"Hey now- this isn't fair," she says, "You get to be fucked and I don't!"

"I'm willing to share this cock," Casey replies, "After I've cum, of course."

"Yeah. Do you want that," you ask.