You make her an offer

"While I do take pity on your plight... and I certainly hate Orcs..." You say as you step towards her, your hand caressing her hair on her back. "It would be hard for me to justify why I risked going to war with them without justification..."

You see her shudder nervously, looking down at you as she asks, "What... what do you mean?"

"I could easily just release you... but the Orcs, the elves, and my own people would find that an insult..."

Looking into her eyes you see the elf reply softly, "Please sir... I'll do anything... just don't give me back to those brutes! I can work... hunt.. anything... just please don't give me up...."

You smile as you reply, "I certainly don't intend giving you up with that attitude...." Your eyes wander from her breasts down her shapely body, you guide her to sit down on a bed, bringing her eyes level with yours, running your fingers through her soft hair you continue. "The only way you can stay is if you give me something in return..."

The elf's eyes go wide, "But... I... I mean you're of another race! My people are known for keeping our purity... If I have sex with goblin or come back with child I would be cast out! Surely I can't stay here... I... I can't live amongst Goblins!"

"Better than returning to the Orcs..." You reply, your hand lifting her head up by her chin, "Besides... you will be well taken care of here... Goblins always respect those that lie with the chieftain..."

She is considering your offer as you hear a familiar voice behind you.