With Tabitha lustfully tasting the inside of her mouth, Vipress couldn't resist the sinful pleasure if she had wanted to - which she didn't. She returned the favor with her own forked tongue, slipping the long slim counterpart into Tabitha's mouth, hissing into her lips.
She was growing. Growing. The aching and stretching of her body had reached incredible intensity, as if somebody inside of her were pressing her out from within. Between gasps of frenching the human and feeling another mini-climax rock her reptilian body, Vipress glanced down to see herself thickening evenly. Big snakes would taper off at the neck and tail, staying disproportionately bulged around the middle, but Vipress was inflating evenly and completely, her tail reaching a slim point but her body maintaining the same thickness throughout her length. Her length! That was increasing too! She must be 14 feet now. No... 15. My God, but she was growing fast!
In time, she marveled as Tabitha began to look tiny on top of her. Her face - her whole head - had grown so large that she dwarfed the human's by twice. She was easily as thick as a tree trunk now, and distantly she felt her tail slap a wall at the other end of the basement. Tabitha was in the throes of delight, grinding her wet crotch into the snake's slick belly plates, getting herself off. Vipress let her master continue, watching the display with arousal as she grew bigger and bigger beneath her, the sheer weight of her massive serpentine form beggining to press the springs down on the couch. At last, Tabitha cried out, pulling away from the snake's face and throwing her head up. Vipress hissed delightedly, smiling.
Tabitha looked down as she finished, looked back, and her eyes widened in wonder. "Y-You're enormous!"
Beaming with pride, Vipress only nodded as she began to spill over the couch, her immense body too big to lay comfortably. Her head alone was easily approaching the size of the human's whole torso. She could only imagine how massive her coils were getting behind her.
And still she grew. Tabitha gently brushing the back of her neck as they laid on the floor together.
"Is it stopping?" Tabitha giggled. "You might fill the whole damn house at this rate."
"Not ssssstopping." Vipress responded, practically panting in lust. She grinned back and chuckled, eyes closed. "Perhapsssss you gave me too much."