My younger sister and I have been friends for as long as I can remember, I spent 95% of my time with my sister I went with her to anything she wanted to go to. Today she wanted to browse the vendors that where set up for pride and I went with her as usual. She saw a capsule that was on a chain set up in tg corps stand and bought a heart shaped necklace as well. She handed me the capsule to wear and I wore it to avoid being rude. I noticed a few small changes during the first day I was being more social and open she was showing off her body more. After the parade we went home to sleep and prepare for tomorrow's day on the town. I took a shower having forgot the capsule existed and washed paying half attention I normally would have noticed the small A-cup breasts, the lack of hair on my arms, or my smaller member but in my exhausted state I ran on autopilot. I passed out nude in my bed like usual and slept like a rock.
During the night
My body compressed shrinking down 6 inches. My dick slid into my body forming a new tight slit. My hips burst out my thighs thinning and feet shrinking. My waist crushed inwards giving me an hourglass figure. My shoulders shrunk and my hair became longer and blonde. My face became smooth and feminine my nose shrank my cheek bones became more defined while my jaw softened. My arms thinned my hands shrank and my fingers became long and thin. My chest began blooming out more going from an A-cup to a C-cup overnight while my butt bubbled out lifting me slightly off my bed.
When I woke up I was astonished and confused I tossed on a shirt and borrowed my sisters jean shorts but didn't put on any undergarments I felt far hornier than usual and went out to town looking for new clothes we decided to pose and show of our assets when we left the mall.
XXX
We noticed two muscular men walking out of the mall causing us to feel hornier the capsule reacted sliding down more releasing peculiar pink gas that made us itch for a nice dick between our legs our excitement couldn't be contained as we ran up to the two muscular man asking them if they'd like to rent a hotel room and have a foresome they agreed to have a foresome and went to the closest hotel to rent a room. We walked towards our room each of us either soaking wet or having a giant boner. He pulled out a keycard and slid it into the scanner with a loud beep the door unlocked. They opened the door revealing a small hotel room with one queen bed a small tv and a bathroom. They all walked in and began stripping off clothes the instant the door was closed behind them. We all got on the bed and I got on my side while my sister leaned over and started getting fucked doggy style.
I got on my knees and started making out with my sister this felt so blissful compared to before. The other man placed his dick at my entrance and thrust into me allowing me to feel closer to my sister than ever before, we'll be doing this a lot more in the future.