"Galla," mused the sadistic Beth. "You've always pretended to be such a pure woman. So virtuous and chaste. Well," she said, pinching one of the princess' nipples, "Let's see how long your mind can hold out before you become a beast in heat."
"No," whimpered Galla. "What are you... going to do?"
Beth was already drawing runes on the princess' naked flesh. She struggled in her bonds, but she was firmly strapped to the table. When the queen was finished, she leaned over the helpless, whimpering girl. "I'm going to summon a beast-spirit to replace that miserable excuse for a mind you have. The fun part is... I don't know what kind it will be! The spell summons a beast-spirit most appropriate for your personality. I can't wait to find out what kind of animal you really are on the inside. Please, try to resist the transformation... it will make it that much more slower and fun to watch."
The old queen sobbed in dismay as she heard what was going to happen to her daughter. The king begged Beth not to do it, but of course his pleas fell on deaf ears. The room darkened as Beth began to chant a magical incantation, and soon a dark cloud hung in the air above Galla. It swooped down towards her mouth, obviously seeking to enter her body, and she shut her mouth, holding her breath, attempting to deny it entry. The cloud hovered around her head for a moment... and then plunged straight down to her vagina. Galla shrieked and tried to close her legs, but her legs were spread wide by the straps, and the dark cloud disappeared into her most private place, sending Galla screaming and jerking wildly in her straps.
A few moments of silence followed, in which the only sounds in the room were Beth's evil laughter and Galla's quiet sobbing. "It... got inside me," she whimpered. "Something's... inside me... help... mommy... daddy... it's taking me..." She began to writhe her naked, rune-covered body strangely within her bonds.
"Don't give in, Galla!" her brother shouted to her from the next table.
Beth began to stroke herself. "Yes," she hissed. "Fight it. I want to see you change slowly."