You took it like a champ!

You remember nodding back at her submissively. After all of the long nights, studying under Trish's instruction. It was time for you to finally show her, that you were worthy of her training!

Vrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

The instrumentation activated and the pressure of the massive head began to build on your back entrance. You reached past your wrist restraints and gripped your little ankles. The urge to tighten your back entrance increased and you had to **** yourself to relax. You remember closing your eyes and taking a slow warm breath...

Pop!

The nerve endings within you had come alive as the bands of your outer and inner sphincter stretched around the immense girth of the dildo. You had gripped your ankles tightly and tried to savor the slow advance of the dildo as the piston **** the intrusion deeper and deeper.

"Woah! Oaaaaaah! Ehhhhhhhh!"

The dildo had slid easier into your back end than your poor little modified pussy. The lubricant from your womanhood and your training had seen to that! The vibrations within your clit had kept you peaking for what felt like hours. Each orgasm forcing your sphincter to grip the width of dildo. This heightened the sensation of each orgasm.

"Good girl," Trish praised you as she gently patted one of your butt cheeks. "You've just earned your anal certification! Your finally ready for Master!"