As Mei keeps thrusting into you, the motion of your sex pushes you up against the jewelry box, right where you left it on the counter. The box slides closer to the edge which each thrust, until finally it falls off the counter. But you don't pay any mind-- you're too horny, and too focused on fucking Mei to care at the moment.
Finally, with a long moan of ecstasy from both of you, Mei's penis shoots its load of cum into your snatch, and you are both overtaken briefly by another intense orgasm. You both collapse limply on the counter for a couple seconds. When at last your hearts stop beating so heavily, you exchange an anxious glance. Brooke has gone to sleep, the effect of Kira's desire has been satiated, and both of you are finally thinking clearly again. "Oh shit," you say in Mei's voice. "We... we shouldn't have done that..."
Mei pulls out of you, racked with humiliation. "Oh my god... I... I am so so sorry... I... could not help myself..."
"I can't believe I did it again," you sigh despondently. "Brooke is going to be so pissed at me."
Mei walks around behind the counter and grabs some small towels from the back room to begin cleaning up. She hands one of them to you. "We were under a magical influence. You really can't be held accountable for what you did. And, technically, you know, Brooke was just as complicit as either of us."
"That really doesn't make me feel better," you answer, cleaning yourself. "I knew this was wrong. I KNEW it, and yet, I did it anyway." Filled with shame, you instinctively reach for your clothes to get dressed again, before realizing that you actually should be putting on Mei's clothing. Quickly you put on her panties, followed by her skirt and shirt. That is when you notice the magic jewelry box lying on the floor where it fell during your tryst. You see that it is open. As you lift it up, your heart nearly stops.
The other items are still there, but... the ring is gone.
"Uh-oh...," you say. "Uh... this could be a problem."
"What is it?" asks Mei, putting on your shorts.
"The Transference Ring! It's not here!" you exclaim. "The box fell off the counter while we were... uh... you know. The ring must have fallen out and rolled away! Mei, we've got to find that ring, or Brooke could be..." You can't bring yourself to finish the sentence. You can't let the same fate that befell Kira happen to her sister, too. The very thought of Brooke being trapped as a penis for the rest of her life because of something stupid that YOU did is too much to handle.
"Calm down," says Mei. "We'll find it. It must be here in the shop somewhere. Let's just split up and look for it..."