Sarah was not a biological relative of Cal and Katy, she was adopted from Macau, China. Part Penelope Cruz, part Yang Mi. Her Portuguese blood gave her breasts that, even at 18 yo, didn't seem to want to stop growing. A full C breasts on a thin frame she had talked to a plastic surgeon about breast reduction. A tall full body with dark brown eyes, somewhat slanted, but also European traces of brown hair streaked through her otherwise raven colored hair.
She had come home in her local high school cheerleader outfit. When she heard the strange sounds of a dog grunting and Katy screaming encouragement. She gingerly opened the door to see a a huge German Sheppard walking around on his hind legs! Like some kind of trick the dog's bones started to crack and shape as it become a nude toned man who was Cal! Katy notice her first.
"Cal I think our exotic sis wants to make it a threesome." she grinned
Cal turned, his dick erect and collar in hand, Katy nude as well pounced on Sarah. Their adoptive sister found both of them hard but they were powered a lust that make them somewhere between human and canine they wrestled with her. Katy radiated a powerful aura of lust that was natural for all cursed women. Somehow the curse had altered her human form, too. Her breasts seemed tighter and her whole body movements resembled the nimble movements of a dog more then the steps of a human girl.
Sarah's shirt and bra were ripped as her boobs spilled out both her siblings let out a groan/growl.
Sarah started to shout "Rape!" but she was like a rabbit caught by two wild dogs with, Katy was never stronger and more powerful.
"Grab her arms!" Katy shouted at Cal.
He took his wrestling sister, who had kicked him in the balls to no effect, and pinned her arms above her head. While Katy ripped at her skirt and then her sister's panties. With powerful legs from cheerleader practice she kicked Katy in the head and the collar went flying so she grabbed the dildo. Like trying to stab her with it like a knife she attacked her wet hole, the dildo slipped into her vagina. The effect was electric.
Confusion entered Sarah's mind as she started to slacken and let go with a moan on pleasure and defeat. Her body was betraying her to the dildo.