A grave mistake

Your breaths grew shorter with every second. Sierra's body felt... Incredible. Yet at the same time, you found yourself reaching for air as her anxiety overtook you.

Your sense of amazement was rivaled by the panic that enveloped you, part yours, part Sierra's. What if you get stuck in this body forever? Surely there must be a way to go back...

Your sister briefly looked up from her phone at you with a quizzical look. Your eyes darted from her to Dana, to the new overwhelming sensations of your body. Your athletic feminine form, the sweat under Sierra's sport's bra, the blonde strands of hair that frame your vision, and the slender hands that bore the ring which gave you this body.

The ring!

In blind enthusiasm spurred by your panicked thoughts you reached one of Sierra's soft hands over the other, and yanked the ring off your finger. The shapphire ornament almost seemed to resist, but with Sierra's surprising strength, you managed to get it off. You didn't notice the dim glow of the gem until the ring landed on the floor and you watched it fade. Your eyes narrowed as the realization dawned on you.

The ring was off, but you were still Sierra. You self-fullfilled your own fear. You're stuck.

The movement must've been pretty bizzare, since both of Sierra's friends were now looking up from their phone. "Si, is everything okay?" Dana asked, but your sister's eyes were elsewhere. The ring landed near her, and to your horror, she curiously picked it up, sliding it on.