Obediently, still scared for his life, Brendan gave Vipress another spray of pink liquid. The strange chemical drizzled across the snake's glossy scales and seemed to soak into her. In seconds, the sentient animal squirmed in her own coils and raised her head back.
"Yesssss!" She hissed. It was an almost pleasured noise, and caught Brendan off guard. Watching in dumbfounded amazement, the teen gaped - still half stoned - as the viper grew and grew in ecstasy. Her form on the bed was getting longer, thicker, more powerful. Her head was growing longer too, more elegant, and from the look on her face, it felt good to grow like that.
Brendan gulped as she topped out at nearly six sinewy feet long, stretching out in length on his bed and looking herself over.
"Yesss..." Vipress hissed again, as she elegantly coiled her bigger and more powerful length. "Ssskin contact makesss me grow." She looked at the bottle in Brendan's trembling hand and an idea came to her mind.
"Ssslave..." She began, slithering forward towards Brendan - who jumped - "I want to ssseeeee what happensss if I drink the potion directly."
"A-All right." Brendan looked at the snake's neutral expression and gulped. "Mistress." She said nothing, further unnverving him, and he fumbled with the bottle, taking off the screw cap and jostling the contents.
"Careful!" Vipress said sharply. "Don't ssspill it!"
"Sorry, Mistress!" Brendan gulped, and with more care he separated the bottle from the spray handle.
"Good." Vipress nodded. "Now, bring it closer to my mouth."
Brendan winced, and brought his hand closer to her scaly face. Her tongue flicked eagerly. "Now, pour sssssome into my mouth. Not too much. Jusssst a little."
Brendan obeyed, focusing on not spilling a drop anywhere other than the snake's open and waiting mouth. He saw the duel death fangs held safely in the roof of her mouth and tried not to think about being bitten. She was holding her end of the "deal" as long as he did, it seemed. With a slow movement, Brendan upended the bottle and poured not more than a sip's worth of the pink potion into Vipress's maw.
She threw her head back and gulped, slapping her mouth shut. "Now we wait." She watched her slave's trembling and felt a twinge of guilt. "Sssit, sssslave. You've done well for now."
With a sigh of relief, Brendan carefully sat on the edge of the bed beside his mistress-snake, watching her with no less nervousness and clutching the bottle tightly to his chest. "Nothing's happening."
"Patiencccce." She said gently. "I think- yessss!" Her eyes widened and suddenly her head swayed. "I feel... dizzy! Ssssomething'ssss happening to meeee!" She winced in pain suddenly, and let out a loud and frightful hiss, making Brendan jump. "Pain!" She exclaimed, uncoiling loosely and trembling. "Auuugh!"