"Actually... Paris..." Ty said breathlessly, watching the dinosaur continue to enlarge towards her full stature, "I-I think I want to let you keep growing."
"B-But I'm so big already!" Paris gasped, trying hard to keep herself from wrecking Ty's room even as her clumsy foot knocked over his desk and sent it hurdling over.
Ty scampered from the edge of the bed in smiling wonderment as Paris and Parasaurolophus started to approach a truly massive size. Watching her shock and bewilderment as she grew increasingly cramped in his bedroom turned him on again and he found himself sprouting an erection. The dinosaur stared back at him wide eyed and tried to bend down over his bed.
They found themselves face to beak. Paris was growing by the second now, every inch of her leather stretching and pulling as her size and weight increased proportionally. The hadrosaur must have been twenty feet long now. There was no way she could get out of the room anymore. The girth of her hips would smash the door frame themselves. Her powerful tail was crushing in the drywall at the end of the room little by little. She could barely move.
"T-Ty!" Paris gulped, her voice deeper, husky. Her crest was cutting into the ceiling above, sending white dust down into the air. She smelt her lover's arousal and realized what was going on. She smirked playfully. "You like this, don't you?"
"I thought that was obvious." Ty grinned. "Look at what a massive dinosaur you are!" He gently stroked the top of her beak and marvelled at her growing scale. She began to breathe heavily again as she hit twenty three feet and her massive chest began to crush the springs on Ty's bed as she tried to avoid breaking the roof further. The poor hadrosaur giggled as she grew giant and nodded.
"Well, all right." Paris nodded. "But I won't be held responsible for the damage I cause."
"Oh, I'm counting on it." Ty grinned. "I want to see what your big powerful dinosaur body can do."
"Oh?" Paris winked. She kicked out one of her legs and Ty delighted as he heard the wall crack beside her. Her massive foot smashed through the wall and exposed the frame beneath. She giggled as her master's reaction and stretched out her tail, putting it clean through the back wall. All of her rose and tore massive chunks of the ceiling out, crunching through to the attic above and exposing the incline of the roof.
"So big." Ty stared in wonder. Twenty five feet? God, she was enormous. He stared in amazement. The big orange hadrosaur grinned and let herself continue to expand, her front legs splayed to the side of Ty's bed. Her chest pinning his legs down and rubbing his dick as she expanded. Her huge paws trembling as she grew and grew.
"So strong." She whispered, starting to pant in excitement again. "Just for you, buddy."
"Yeah?" Ty gaped.
"Yeah." Paris whispered, jolting as she hit thirty feet long and further demolished the room. "I'm just your big toy, after all. Right?"
"Yeah!" Ty blushed, seeing her sweet smile turn to a hearty laugh. She grew her final three feet long and let out a gasp of relief as the growth stopped. Fully sized, the hadrosaur was hunched over in the destroyed room and panting heavily.
"Now, uh..." Paris paused to catch her breath, grinning. "How am I going to get out?"