The voice in the back of your head telling you not to do this is too faint and your need for this woman is too great. You approach her and put your hands on the sides of her rump. She giggles as you do so and the warning voice gets even fainter. You smile and plunge yourself into her. You finds that she's tight, wet and moist, probably close to orgasm her self. She moans with pleasure as you push in deeper. You begin humping her, your passion making your pace quicken rapidly. She moans with pleasure and encourages you to continue.
As you push in and out you feel an itch all over your body. You see a white patch for fur growing from your crotch and outward. You're startled as it grows up to your stomach and around to your rear. Your pumping slows and you try to pull out, but her tail curls around you and, with more strength then you thought it would have (or perhaps you just weren't fighting all that hard, keeps you close.
"Oh don't stop, baby, I'm so close. And so are you." she says and she backs herself up, pushing you into her further, you feel the stirrings of an orgasm as you push fully into her. You can feel the fur growing up your back and down your legs, and can see it moving up your chest, turning black in places and staying white in others.
"I'm turning...I mean I can't..." You stammer
"You can't turn back now, honey. Once it starts it's going to finish, like it or not." She squeezes your manhood with her moist muscles "So like it." she encourages. You find yourself pumping again. The voice in your head telling you this is wrong is screaming now, but her the pleasure of doing this is too great. Your muscles change, your face re-shapes as the fur overtakes it. You feel a bulge on your tailbone that you know is a tail. The bulge grows and grows. As your load bursts out of you and deep into her, she climaxes at the same time. As this happens the bulge finally flops out into a fully formed skunk tail. You keep pumping until you're completely drained. Then you pull away from her and lie on the ground. You feel her press against you as she lies down on top of you. She whispers into your ear.
"There now, baby. I told you I'd cover you up." She coos
"What am I?" you ask, even though you're obviously an anthropmorphic skunk.
"Mine." She says. The answer surprises you.
"What?" You ask. She giggles again in reply.
"You're mine." She says again "You're the only other skunk in this jungle now, so I'm never you go."
"Wait, I can't stay here I've got to change back." You say trying to push away from her put she grasps on to you tightly.
"There is no changing back sweetheart. Once you spilled your seed in me this became you're permanent body. There was a slight chance the spell would have worn off before you did, but now..." she shakes her head and smiles. "...never. Now be a good husband and go to sleep. We'll need to do this many more times to make sure I'm carrying our young." With that she falls asleep. And so do you.