"Sis we need to talk" you say quickly.
"What's got you so pumped up" she says looking.
"Some old lady just gave me a ring that grants wishes" you say as her face goes from confusion to smiling.
"Oh yeah prove it do something noticeable like make me taller than you or something" she says looking at you like you said the sky is purple and you understand why so you grant her wish.
"I wish my sister was 2 feet taller and nobody but me or her would notice or care" as you finish saying that she shoots up in height quickly she's looking into your eyes than above them then you hear snapping and cracking as her clothes tear when she finally stops growing your looking at her again bare breast.
"Wha... how... oh... how..." she can barley get a single word out.
"See I told you" you say gloating she then realizes she's naked and tries to cover up.
"Holy crap this is amazing please don't turn me back ever" she begs.