Sex to the past

"Princess stop please" Anon begged.

"Anon, I know you know I'm not a Princess," Twilight said, "but I want you to address me as Mistress."

"Twi" Anon started to say before a slap to the face startled him.

"MIS-TRESS! Anon this is your final warning from your Mistress."

"mmiss-tress, Anon stumbled to say.

"Yes my specimen?" Twiilight asked.

"Specimen?"

Twilight gave a second before backhoofing him and reinforced her previous statement, "Mistress! I am your Mistress I own you. Anytime you ask or state anything, you must address me as mistress!"
Taken back by the verbal and physical assertions by her he decided to go with her and replied, "Y.y.y-yes my Mistress."
"Better. Know your place and you will receive pleasure. Disobey or disrespect me, then you will only receive harm," Twilight stated as she continues to grind against his cock. "Anon you are my specimen to test, observe and document. While I am your Mistress and you shall address me as such."
"Yes my Mistress." Anon replied with very little emotion.
"Hmm. Better...You know now that I think about it I am overdressed for what I need to do." Twilight said as she started to rotate her body until her plot was facing his eyes. Looking over her shoulder, her one good eye meets his eyes and she said, "Specimen, remove the fabric from behind me so we can continue."

Anon went to grab it at the small tear that lay between her ass checks, before his body reminded him that he was still bound by her magic. He tried desperately in order to prevent disappointing his 'Mistress' about it, but he figured he was at a complete loss. Although fearful about his observation, he figured that letting his 'Mistress' wait would result in further pain. He careful formulated his response.

"Mistress. You left me without my arms. I can't possibly remove your clothing without my hands."

"Well, specimen what else do you have?"

"I have nothing Mistress."

"You still have your mouth. Use that."

"But Mistress it's too far, " Anon stopped talking as she had backed up to where her plot was with an inch of his face.

"Enough excuses and waiting specimen! You should be honored and stop your pathetic attempts at stalling."

"Mis-"

"Anon! Rip my suit from tail to past my clit or I swear to Tartarus you will feel such pain that you."

Full of fear and just wanting to end his predicament, Anon utilized the maximum amount of his mobility to force his face in towards her plot. Closing his jaw, he hoped his quick calculation worked, his teeth had closed and gripped something. Anon pulled back and an audible rip could be heard. His eyes opened and he witnessed that two tears had appeared from either side of the tail hole in the one piece suit. Somehow each tear followed the apex of each ass cheek and Anon had his eyes locked on a very dark glistening purple puffy asshole.

Anon's head rested on the bed, but he knew that he had only made it halfway with removing the amount of cloth his 'Mistress' demanded of him. So he opened his mouth and slammed his face lower and chomped down on the closest piece of the suit he could and forced his body back down. With a loud rip and loss of resistance his head was once again back down. The strip of fabric was still in hi mouth and gave him a clear view of her mound and asshole. Anon's tongue tingled as it sensed the flavors of the suit. It was a musty and spicy flavor, but he didn't have time to focus on that now for his 'Mistress' seemed to be in a foul mood.

Spitting the cloth out Anon said, "Mistress it's done."
"Good," Twilight said as she go up and jumped off the bed, "Seems like i can finally collect those samples."

Twilight raised her tail as much as possible, which was only a couple inches. She had draped it to her left side and Anon could see her asshole and horse like vagina between her legs. She shifted her body around in a way to suggest she was preparing for a fight and once she settled her voice broke his thoughts.

"Specimen. I am ready to take an anal sample."

"Twi-" Anon received a glare and a slap out of nowhere.

"I mean Mistress, what is it you desire."

"Fuck me in my Ass! I must have your sperm in my ass right now Anon."

Propping his body up and arms following the main body, Anon realized that her magic no longer restrained him. It was the perfect opportunity to subdue his would be pony rapist. As he formulated a plan, he had noticed something. The purple pony seemed to be shaking and nervous. Anon felt bad for his Mistress, but didn't want to anger her.

"Mistress are you OK," he said as his hand rested on her lower back.

"Anon Just fuck me till you cum in my ass right now, or else." She replied, while maintaining a 1000 yard stare.

Anon felt like something was off, but he was in no position to get it out of her. Also he didn't want to press the issue. So, Anon walked up behind Twilight and carefully grabbed were her cutie marks would be at on the suit. His cock having been at full mast, since a little while after they first met, was easy to line up with her puffy pucker.

"Do you need any lube Mis"

"JUST DO IT" Twilight yelled.

Whether it was slight bit of empowerment he got after being dominated, his love of ponies, or just given the go ahead on having anal with a female, Anon had let loose his primal side. All of his fingers dug into her flanks as he heard her gasp. Anon drew back and then drove the tip of his cock towards that puffy purple star target. Unfortunately it had barely perpetrated.

"Hnggh, Twilight moaned before goading him on. "Buck me like you mean it Anon, you sorry sack of a human specimen!"