Try and work with it.

Your eyes lock with Kiraea, you can feel the waves magical lust emanating from her.  She gives you a little arrogant smile, despite the bruise on her face.  She's already used an illusion on you, gave you a lust potion.  Now she's trying to cast another spell on you.  

Well she wants to cast a spell on me I let her.  Turing away from Dasille you stride off toward Kiraea.  You are fully intent on fucking that smirk right off of her face.  As you approch her she gives you a mocking look of fear as she lowers herself to the ground.  "Oh Hans, Please..." she says in her usual seductive tone. 

She leans back as you move over her, getting ready to thrust inside her.  Keenly aware of her body below you, the swell of her hips and the feel of her body against yours.  Her gasps and cries as you pound into her.  And only dimly aware of her hand grasping yours, fingers intertwined, and between them the shining stone. 

As you pound away at the elven beauty below, you become aware of two things. Tri'lanna telling you "Yes, fuck my sister.  Let her have that stupid stone."  and Kiraea laughing below you through cries of pleasure.

As you slow, coming to your senses slightly Ceinwyn speaks up "Don't stop, how is she going to learn her lesson if she doesn't cum." Looking over your shoulder you see Tri'lanna and Ceinwyn making out with the elven maid Mirae's head buried between Ceinwyn's thighs. 

A hand comes up and moves your head back to lock with the violet eyes of the elf below you.  "I think you should pay more attention to me pet.  Wouldn't want to anger your new mistress."

you feel the shining stone respond to my desire to escape her power.  The incredible lust I had been feeling ebbed as I could feel the stone warm between our hands.  Her eyes seemed to glow for a moment then the lust poured into you stronger then ever... and it felt like in came directly from the stone.  

Suddenly the whole situation is too much to take and your cumming and grasping at the indescribable beauty below you.  The wave of intense pleasure was unlike anything you have ever experience, you barely remember cumming and grasping at her, crying out her name.   When your senses return you are aware of a few things.

You are now on your back.  Your cock is still inside Kiraea as she straddles you.  She is sitting up, smiling down on you as she holds the shining stone before her.  "Such a delightful gift my new toy brought me."  She leans down and kisses you hard,  You kiss her back ferociously, as she grinds her hips against you.  As you both cum again she hold the stone directly in front of your face.  You try to grab it but you can't bring yourself to do it.

"Please... give it back."  Even still under the enhanced lust and pleasure the despair of losing the stone is overwhelming.

"to you... that's unthinkable pet.  You have no idea how to use this.  I on the other hand." Holding the stone in her hand a silver chain forms out of it turning it into a necklace with the shining stone in the center fitting.  "now be a dear and help me put this on."  

Your try to resist as you delicately grab each end of the necklace and lift it up in front of her.   Still laying on the ground you sit up as she smiles and slowly moves up and down gently sending little waves of pleasure through you.   Your hands shaking as they move past her neck.  Without the shining stones magic her power is just too strong to resist.  As both ends of the chains touch they fuse together.  The shining stone resting gently between her breasts.

"Thank you, dear."  She kisses you gently, and another wave of indescribable pleasure rips through you.  You feel her stand up over you and watch as she touched the bruise you gave her.  It heals instantly.  She turns to face Tri'lanna and says, "Don't look so upset sister, unlike you I share my toys."  You turn you head to see Tri'lanna and Ceinwyn staring daggers at Kiraea, however they are both rubbing each other seemingly against their will.