"Hon," said Mike, kneeling down to Michelle, trying to make a pointed eye contact with her, "don't be scared, okay? I'll be back soon." He walked a few feet away from the fire, staring into the stand of trees nearest them. "You want a fight, motherfuckers? You'll get one!" he angrily whispered, peeling his shirt off, dropping his shorts as well, heading naked into the forest.
Tom kissed Shelby on the lips quickly, then did the same, walking a few feet away from the fire, turning his back. The girls could hear a muttered mumbling from Tom, and then he returned, still quite naked. Michelle couldn't help but feel a little sickened by this, but was still in too much of a state of shock to say much of anything.
A howl punctuated the silence, coming from the woods, causing only Michelle to jump.
"Tom, your brother NEEDS you," said Shelby, an urgent tone in her voice.
"Yeah, I know...it's just...I'm having trouble with it," Tom replied, seeming embarrassed.
Shelby stood up, walking to him, running her nails down his chest. "It's okay, baby. It gets easier the more you do it. Let mama help you," she cooed, smiling fiendishly. "Just look up at the sky, right at the moon."
"Okay," Tom replied, staring skyward.
"I need a beast, not a man, Tom!" Shelby said, grabbing his cock in her left hand, stroking it to rigidity in a moment. "Feel the fucking beast rise up in you, feel the moonlight fill you!" Shelby said, stroking him quicker now.
"Uggghhh!" gargled Tom, his muscles beginning to bulge, "It's...it's working!" His eyes were now amber, glowing with a new energy.
"Fucking change, love!" Shelby said, more forcefully now, getting worked up. She was jerking him off with lightning speed now, still talking to him in an almost mantralike way. "Feel your fangs grow, feel your strength surge! Cast aside your weak human form, and change!" Shelby dropped to her knees now, fellating Tom's now-sheathed cock, its reddened tip sliding out, glistening with precum.
The air was filled with the slurping sounds of enthusiastic head, and popping,reshaping flesh. Michelle watched with horror and....arousal?? as Tom's body warped into a new shape. Soon he was covered in black fur, hands and feet with razor-sharp and glistening talons. His face stretched out into a muzzle, complete with a wet, black nose. And he howled as he erupted into Shelby's mouth, sounding remarkably like the howl that had echoed from the woods a few minutes earlier.
"Now go, love, and DESTROY the agents!" commanded Shelby. The black werewolf ran off, howling into the woods, looking for his brother. Shelby turned her attention to Michelle, who had huddled into a tight ball, her knees pulled up to her chin, staring fearfully up at Shelby. Shelby wiped a small bit of cum from the corner of her mouth. "Sorry you had to find out about it this way, Michelle," she said, not showing a hint of the feral nature she possessed. "Really, we wanted you to find out some other way...but shit doesn't always go as planned."