Katy sobbed and wept openly as Cal, not sure what to do, came to comfort his sister. His flaccid dick exposed his sister rounded on him like a snake biting someone who had its tail. She snapped the collar onto Cal's neck. His shout of anger became twisting into a scared howl as he ripped off his clothes fur erupted from every pour. The curse caught onto Cal quicker than Katy ever dreamed.
Katy could already see his canines grow a sharp point, his exposed penis had changed shape into a full-blown and fully erect dog cock red flesh protrusion like lip stick from the furry pouch.She grinned an evil grin as she stroked her hands through the fur growing up his back, caressing his muscular shoulders as they became strong canine haunches. His face pushed out into the shape of a German Shepherd’s, and Katy giggled demonically as she licked her bother’s wet snout.
She cackled, “Good Cal, good doggie,” as her brother—now entirely a beast—continued to plow his bright red cock into her slit.