Anna continues to pump her hole, but tries to be silent.

I couldn't stop now. The pleasure was too much. The building pressure swept away all other thoughts. I was too close, I could feel it. My right hand kept working my hole fervently, while I clamped my other hand down over my mouth as hard as I could, trying to suppress my moans and whimpers. I hoped that would be enough to avoid detection.

The footsteps came closer.