You pick the image of a weasel, errrrrr, mongoose. A mongoose wouldn't have reason to kill another mongoose after all. Hopefully.
A dart shoots out and hits Cory in the thigh, not far from his massive erection. Cory yells in pain as fur begins to spread around the puncture site. He doubles over in pain as the transformation accelerates. His body elongates and his faces pushes out into a muzzle, his cries turning into angry animal screams. A tail emerges from his backside, swishing wildly.
You watch his proud member shrink away. Rows of nipples protrude from his underside. What was once a proud male has now had that stripped away.
In short order Cory is curled up like a furry ball on the ground.
"Unlike your brother," the voice chimes in, "Cory is not one bit affected by animal instinct."
A trap door opens. In come another mongoose sniffing the air. Mike!
"Do not worry, Kevin. I assure you your brother is fully in there. Just not able to control strong animal instincts... such as sex".
You watch Mike creep towards his best friend, his penis obviously erect.
Cory, still not use to her new body, is surprised by your brother who is quickly upon her. She squeals helplessly as he pins her down, biting her tail and pushing it aside with a paw. Whatever resistance he had goes away as he takes a big whiff of her sex, breathing in the pheromones.
Cory moans in a mix of fear and unexpected pleasure as Mike's tongue prods at her new virgin sex. The screen zooms in, giving you a close up view of the male sampling the female with his tongue.
"Just like helpless Cory here, your brother is certainly screaming for this to stop"
The tongue laps in and out, covered in the female's juices.
"But he can't help the lust"
As the male mongoose now positions himself to insert his penis into his best friend's vagina, a new set of images pop up.
"Now, what of you?" the voice says ominously.