A Slime.

As you slithered through a forest, you found a blue slime lazily stroking her cock. She noticed you, and instantly moves to try and fuck you. She rushes forward and wraps your cocks in her wet, gooey slime, while trying to shove her slimy cock into your pussy.

Your snakes swarm the slime, licking and kissing and teasing her. You also thrust into her, moaning at the feeling of her slime on your cocks. After a few thrusts, she blows her slimy load inside of you, filling your pussy with thick, blue slime cum.

You respond by cumming with both of your cocks, spewing thick ropes of cum inside the slime. The slime seems to be losing focus, submitting to your snakes and your rapid, hard thrusts.

She blows her load a few more times, sort of melting into a puddle as you outlast her with your superior stamina. Upon subduing the slime you grab her, and start slithering back to the cave to your wererat slaves.