Give in

Her eyes gleam with lust. Her pussy is so warm, and tight... She has a beautiful and caring smile on her face. You can't help but start moving your hips, eventually thrusting roughly into her. She smiles wider, pulling you into her. The warm, soft skin makes you tingle with pleasure. You decide there's nothing left to do but spend the rest of your life with the siren.

Her vagina contracts around your cock, massaging it, trying to milk you for cum. You lean in and kiss her passionately, running your hands up and down her curves. You don't care that you're running out of breath. In fact, the water is kind of calm now, almost accepting your sacrifice.

Through the water, she starts to sing her song again. It fills your ears, a pleasant haze overtaking your mind. All thoughts of danger and negativity are gone, the only thing mattering to you now being sex. The siren puts her hands on the back of your head, tenderly playing with your hair as she deepens the kiss. You continue thrusting, your orgasm nearing.

"I'm... gonna cum..."

She gleams at you. "Let it out..."

Her words urge you on and soon enough your body is taken over by pleasure as you start to shoot thick ropes of semen into your new goddess. She gives an adorable moan, squirting her liquids onto your cock. It's quite like a human's, except more thick and warm. You don't have time to evaluate it before she presses against you, hugging you.

"Goodbye... Thank you..."

You sigh happily, glad that your life be ended by being given to such a wonderful being. She leans her head on your shoulder, her warmth slowly driving you to sleep. As you lose consciousness, her form quickly shifts into a horrible monster, devouring your asleep and pleasure-ridden body. Afterwards, she swims back up to the surface to wait for the next oblivious traveler to dine.