Vipress lurched forward suddenly, nearly tilting off the edge of the bed, and her eyes became wide with fear. All of her six foot length was writhing and pulling in agony, and she cried out.
Petrified, fearing her wrath, Brendan offered his hand, rubbing behind her head and along some of her back. The snake's eyes - pathetic and scared - stared into his and her expression softened. She cuddled close to his chest and wrapped her tail around his waist, seeking more comfort. "H-Hold me!"
Though still scared, Brendan gently embraced her head and a length of neck against his chest. The snake winced in pain and clenched her eyes shut. "I'm in ssssooo much pain." They waited for a moment more, Vipress trembling against her slave, and then there was a soft stretching sound from deep within the snake's body.
She stiffened up and her eyes went wide. There was a pulse from within her, and the viper suddenly swelled larger and longer. Her bigger face turned to regard Brendan in shock. "It'ssss... feeling good now. What'ssss happening to meee? Can you sssseee?"
"You're starting to grow." Brendan watched, breathless.
Another pulse hit the snake and she seemed to blush beneath her eyes, her scales darkening. "Ohhh... it feelsss niccce." She grew further - a lot - gaining almost a foot to her length and growing in overall size. Her head was now nearly as large as Brendan's hand.
He held her against him, feeling her thicken and shift and she grew, and the sheer weirdness of feeling it intriqued him.
Another pulse made her tremble, and she swelled tremendously, the third pulse seemingly more powerful than the last. She extended another foot and a half and gasped out loud in rapture as she enlarged, thick as Brendan's upper arm now.
"You're getting huge!" Brendan gaped, watching the slow pulses of growth with amazement.
"Yessss...." Vipress smiled, her thoughts... elsewhere. Distracted. "It'sss now sssstopping...."