Amanda decided that some muscle would go a long way to messing up Beth's shapely curves. Add some bulging biceps and big pecs and that would conceal her womanliness. And so, she set the gun to increase muscle, slid her window open (in case the guns beam was reflective on glass - after all, it wasn't really just a beam of light) and fired at Beth.

But, as poor Amanda had not yet tested the gun elsewhere she was not aware of the nature of the guns function. Had she tested it on herself she would have discovered the side effect the gun had of increasing feminine qualities such as bust size. This was because the gun utilized the body's natural propensities towards development to build muscle - it just bent them towards the muscle end and then accelerated them.

Beth's body for example had an unavoidable feminism. Instead of growing larger, her muscles tended towards growing denser. Definition and tone came to her much faster than size did. And, of course, her body had an extreme tendency towards developing feminine attributes, and so the gun could not avoid those as it built muscle.

As Amanda watched from her window she saw Beth's legs reshape - but rather than becoming bigger, they became even more shapely and sexy. Her thighs added some size and a lot of tone, as did her calves, resulting in curved pillars of feminine power that would bring men to their knees as easily as they could crack skulls between them.

Her ass became tighter and firmer, growing slightly to add additional curves to her lower body. Her waist added a few inches - but as it was all perfectly toned muscle it simply made the tight abs Beth was proud of even more spectacular. Her arms did develop biceps of noticeable size, but these served only to add pleasing shape to Beth's slender arms.

And then, worst of all for Amanda, those prodigious breasts of Beth's, backed by an increased amount of pectoral muscle, swelled larger and firmer on her chest. They now deformed less from the weight of her body resting on them, which, combined with their increased size, provided the first thing that Beth actually noticed about her change - as it caused her to rise off the ground.

Amanda gasped as Beth sat up to take stock, a move which gave the overstressed bikini top it's opportunity to slingshot across the lawn as it released the pressure it had held in. Beth had been, Amanda had to admit, an image of beauty before, but Amanda had now turned her into a work of art - and as much as Amanda might not like her any more, she wasn't sure she could bring herself to marr such magnificence.