Stuff her

"Of course," I replied, reaching for the vibe.

She passed it too me along with the bottle of lube. I pumped a healthy measure on its smooth surfaces, then also on my fingers. The doctor placed her hands on the counter top, spreading her legs slightly and pushing her bottom out so that I could just glimpse her dark anus.

I slid one hand up a stocking-clad leg, then spread her cheeks a bit more. With the lubed fingers of my other hand, I gently started to circle the taut rosebud until it loosened just enough to admit one finger. The doctor made appreciative noises and changed her stance slightly to push my finger deeper. Taking that as a sign to keep going, I inserted another finger while letting my other hand explore the smooth skin of her torso, eventually cupping one of her breasts. After more thrusting, I was able to get three fingers inside the confines of her cinnamon ring - it was time for the vibe. Shaped like a smooth spike with a taper that flared out into a wider base, it slid in smoothly, requiring gentle pressure as it grew wider. Sarah made noises somewhere in between discomfort and pleasure as her muscles stretched and flexed. With an almost inaudible pop, it had entered as far as it would go and the bright green circle of the base rested between her flawless ass cheeks.

I turned the vibe onto its lowest setting, which sent a lovely shiver through the doctor's body.