Looking over her amazing centaur body, and thinking back on the mermaid she had sex with earlier, Christy decides that this party is the perfect chance to make more people into monster girls. Considering that this is a pool party she figures she should start by making some water themed monster girls.
Starting things off simple, Christy points the gun at a guy showing off to a pair of girls by doing a high dive into the pool. Christy manages to hit him with a shot just as he lands in the pool, and after a few seconds he-or rather she now, emerges onto the side of the pool. Her legs are now a crimson mermaid tail matching her now ass length red hair, her new breasts are larger than her head and her nipples have been replaced by a pair of ten inch long cocks. The two girls walk over to her, impressed by the dive, and sit on both sides of her, beginning to suck her dick-nipples while the mermaid fingers their pussies.
The next target is a girl who is struggling to service two previously transformed people, the girl with a trio of dicks that used to be guys, and the girl with the three different animal penises. As she struggled to pleasure all six cocks with her hands and mouth her arms began to split and morph, her skin beginning to turn a shade of purple. Her arms quickly split again, leaving her with 4 tentacle arms on each side of her body, with which she began to jerk off five of the dicks while she deepthroated the horse cock. The changes continued across her body, her tentacles becoming shade of dark purple with her torso a slightly lighter shade. The changes reached her legs and they began to morph and split like her arms until she had eight tentacle legs. With her new appendages she began to rope in more of the surrounding people as her leg tentacles began to split rapidly into more tentacles, several of which were tipped with cocks that she began shoving into peoples pussies, mouths, and asses. Soon enough, an orgy formed around her of men and women from the party, all of them being fucked, stroked and penetrated by her many tentacles.
Christy looked around for her next target and spotted another the people she had changed earlier, the cheerleader that she had turned into a femboy. Him and the jock seemed to have decided that grinding wasn't enough and were out of the pool and had begun to strip, the femboy taking off his bathing suit and bending over one of the tables next to the pool, presenting his ass to the jock, who had taken off his shorts and begun to approach the table when he was blasted by Christy. As the jock walked towards the femboy his hair grew longer, his body thinned out and became more feminine and his chest inflated until a pair of large breasts adorned the now futanari jock's chest. As the futa jock grasped the femboy's hips her cock began to change as well, growing much larger as it's head flattened, a sheath then grew at the base, and the futa's balls tripled in size, she thrust her new two foot long horsecock into the femboy's ass, causing femboy's own cock to erupt into an orgasm from the pleasure. The futa's body began to change further as she stretched out the femboy's ass hole with thrusts of her giant horsecock, first her torso stretched out longer, then her legs fused into a fish tail and the bottom half of her longer torso bulked out and morphed into the front half of a horse torso, and a pair of forelegs with hooves grew from her human hips-turned horse shoulders. The new hippocampus-taur's cock blasts her seed into the femboy's ass as her lower body is covered in blue scales completing her transformation
Christy, satisfied with her aquatic transformations then began to survey the rest of the party goers, wondering what changes she should make next.