Missing

Sienna’s POV

I stood there for a while after Vivianna walked away. My heart was beating a little too fast and I didn’t know why. The way she had snapped at me. The way she was on the phone one second and then pretending nothing happened the next. It didn’t sit right with me. Her mood had been strange all day, and I had tried to ignore it, thinking maybe she was just tired or in her own head. But n