Matt stared, mouth open slightly.
"Well, have you been out spending money on sexy costumes again?" He asked sarcasticly. Selina was shocked, he wasn't at all frightened. He dived a little nearer. Selina instinctivley lashed out, a clawed paw hitting Matt in the chest.
"Hey hey careful, it's quite a realistic costume!" He said sternly.
Selina could smell him, turned on by her. He closed in on her some more tweaking one of the pert nipples. Selina felt a heat rushing through her body, lust building inside her.
Matt's hard shaft began to poke at the inside of his jeans. Selina tried to remove them but got frustrated, tearing them away with her claws. The smell of lust radiated from Matt's manhood. Selina pulled his boxers away, revealing his cock, precum already flowing.
Selina licked the cock head clean of precum and dropped on all fours, with her breasts down and her arse held high in the air.
"Oh so you want it 'catty' style, well I think I can do that." Matt said as place his arms around her breasts and mounted her.
It was rough, Matt strugled to penetrate Selina's tight panther pussy.
"This thing is tight, are you Ok in it?" Matt asked. Unable to answer Selina nodded quickly. Matt decided she was not in the mood for talking and continued thrusting into her. Finally his shiny cockhead penetrated, driving hard into the back of Selina's cunt. Matt closed his eyes in ecstacy, not noticing the layer of black latex fur wrapping itself around his legs.
Selina's claws sank into the carpet of the bedroom as Matt thrusted himself deeper into her. She felt the barbs forcing their way from Matt's cock head. She glanced back to see the black fur spreading down his legs, meeting at his feet to form powerful new paws. Selina tried to warn him but all that came out was a feline snarl. She glanced up at her boyfriend's face as the fur spread up his neck and began to change his hair.
Matt opened his eyes just as the latex spread to his face. He looked down at his chest in horror. He snarled a panther's snarl and looked back at me.
"What have you done?" He growled angrily. Selina stared back.
"I tried to warn you" she replied "but it came out as a growl."
"Ah crap" Matt sighed as the latex formed a new muzzle, "how do I stop this?"
"It started when you penetrated but you can't..." Selina started, but it was too late mate had tried to pull out of her. The barbs caught on the walls of her cunt and stuck hard.
"You've got a cat cock now" Selina snarled in pain "you can't just seperate like that anymore."
Matt stopped thrusting.
"Do you like your new form?" Matt asked Selina.
"Yeah, it's quite fragile yet extremley powerful, why?" she added.
Matt did not answer, he just began to thrust into her again.
"What are you doing?" Selina asked.
"Becoming a panthe like you, can't leave you to go around the zoo and screw every panther you see." Matt answered.
Selina panicked. How did he know? She thought it best not to ask. Matt let out a huge bellowing snarl as he came, gallons of warm panther seed flowing into her. Selina buckled as Matt finished changing and she too came. The strong smell of their sex filled the air. The two of them licked each other and Matt seperated from her. He stood on his four new paws as the last of the fluids drained from his barbed member. He collapsed onto his back cock in the air.
It was then that Selina noticed