"Stop it, Dan!" Tara yelps as an overwhelming feeling overtakes her, particularly the feeling of her bikini getting looser and looser. You eventually stop firing and lower the gun down, and you notice Tara with a confused look over her. She is holding her stomach, initially you think she might be feeling sick. While you're trying to put this together in your mind, you feel the gun ripped out of your hand from behind.
"Yoink!" you hear from behind you, quickly glancing around to see Tara's 18 year old sister Demi had stolen the gun. Before you could challenge her, she spoke.
"Hey sis, whats up with you?" she asked, approaching Tara. You didn't wish to confront her about the gun until you were sure that Tara was ok.
"I'm fine, I jus... I...." Tara mumbled as she looked up. She realised something was wrong - whereas she was normally marginally taller than her sister, Demi now seemed to be a bit taller. You also notice that Tara does infact seem smaller... but how?!
"Shit Tara, are... are you shrinking?!" Demi eventually queries, herself noticing the change too. The now smaller girl looked up at her younger sister.
"I can't be! This is impossible!" Tara says, getting slowly more concerned. Demi meanwhile doesn't seem quite so disturbed, infact her expression has changed to a smile now. She walks closer to Tara who in turn backpedals slightly, but the change is now much more noticeable, Tara is at least half a foot shorter and apparently still shrinking. She looks at you. "Help me!"
You can't immediately process this simple instruction, your mind too pre-occupied with watching a beautiful young woman shrink right before your eyes, like something out of a science fiction movie.
Demi smiles still, answering the question for you. "Why should we help you? I think it would be cool to be the big sister around here for a change!". Tara looked up at her sister, shocked. As Demi got even closer, Tara shrank more, now only eye-level with Demi's breasts. "Aww don't worry Tara, your big little sister will look after you!" Demi cooed, gently leaning forward slightly to impose her new position of the bigger sibling. You didn't realise it until now, but this small exchange between the two of them was turning you on. You liked Tara a lot and didn't want to wish her any harm, but this role-reversal was pretty sexy.
"Dan, please go fetch my Mum!" Tara pleaded with you, as it appeared Demi wouldn't give her the chance to escape, Tara's much smaller stature being to weak to push Demi out of the way, something which usually wouldn't have posed a problem. Demi laughed.
"Awww little baby is crying for Mummy!".
You're about to leave, when suddenly...