She grows

"Your sperm has given me much magical power, loverboy!" She laugs, and recites a hypnotic spell. The table starts to suddenly creak and Ursula grabs you by your ankles with her tentacles.

Suddenly, she starts to grow. She bursts out, and her breasts are getting immense, the size of your couch. She's bursting out, destroying your house, shattering the walls. You see her octopus ass shaking, and the tentacles are now as thick as tree trunks.

"I thought I needed the Triton's Trident to do that, but I only needed to fuck a human." She laughs again, and grabs you with her human hand.

"Are you scared?" She stares at you intently. "You should be! I am the most powerful witch in the world now." She licks her fat red lips and opens her huge mouth wide. You nearly see the end of her throat. Her massive tongue wraps around you as she tastes your body.

"You'll make a tasty snack... but not now."