You trade her life for your own.
From Create Your Own Story
"Hey there baby. How's it going." You whisper into her ear, and she snarls at you, but doesn't say a thing. She is easily 6'0" in height, and her brilliant blue eyes glare at you behind her tangled black hair. Her ears are sharply pointed and they're clicking nervously as you run your eyes along her body.
"Release her now mortal! We may yet let you live if you do." A voice calls out, and you feel your prisoner's shoulders slump. It must be humiliating to be captured by a mere mortal, especially for a busty amazonian elf, but you're not nearly done with her yet. You've heard that the Amazonian elves view each member of their tribe as a sister, and if they can they'll want her back, even if it's only to kill her themselves.
"I want a horse, and safe passage out of here!" You shout.
"Only the Queen can make a decision like that. Release our sister as a gesture of good faith, and we will take your request to the Queen."
"If I release her you will kill me, and don't bother trying to deny it. I was transported here against my will by some foul magic, and you attacked me first. Bring me a horse, let me go, and I will release your girl. I'll trust you to honor your word when I do and let me go, otherwise there will be hell to pay."
"We will promise not to kill you while the Queen hears your terms, but you must let her go first!" The voice replies. You grit your teeth in a semblance of a smile, and rip off your captive's top, to the chocked gasps of her friends in the forest. She purses her lip angrily, but makes no move to stop you, since you have her under your complete control. You reach under her arms and cup one soft breast in each hand, and gently massage them to erect firmness.
"I want that horse and promise of safe passage Elf girl, and you had better hurry. There's no telling what I'll do while I'm waiting." You say softly, your voice full of casual menace.
"We will see." The voice replies, and you can hear movement as some of the warriors move off through the trees, but you know that some are still behind.
What do you do?