No butting of heads...

Michelle was rocking her hips as best she could in her awkwardly chained and sleeved state. She winked at William with a conspiratorial air as he encircled her belly with an arm and brought the butt plug to bare against her anus.

Janet stiffened for a moment in his grasp but kept slowly grinding, thrusting in and up, the plug keeping pace at her cheeks and her small bodies forward movement. Then she withdrew and the insertion of the plug up her rectum started. The first sensation she was aware of was the coldness of the lubricant at her anus, as well as the bulbous girth of the rounded plug head.

She mewled and her little body squirmed as William slowly pushed the plug inside, the tip of the plug passing through several regions of her rectum, each with a different feel. First the plug slipped passed through the outermost layer of her anus, which was overly sensitive and contained many nerve endings that she had been hithertoo unaware of. This tickled and was akin to a relieving bowel movement. “Oh... god.” She whimpered in his grasp feeling every bit a dirty and controlled slut and unable to articulate any form of masculine objection. Her knees quivered and the angle of the dildo shifted, placing unfamiliar pressure on her vulva and clit. More heated moans escaped her pleasure addled lips.

As William pushed deeper the tip of the plug progressed further up her tight little rectum, encountering another narrowing surrounded by strong muscles - her sphincter.

William slowed carefully here. Janet was a tiny thing and he was conscious this part of the insertion could cause the most pain or discomfort if the plug were pushed inwards too fast.

He took his times at this point, methodically filling her. Janet’s eyes widened and she could feel her sphincter slowly stretch out to allow the tip to pass. Meanwhile, the outermost part of her rectum will encountered the wider part of the plug and started to stretch out pleasurably too. This placed increased pressure on the small dildo end in her.

Janet leaned back into Williams body. He was excellent in the role of master and was orchestrating this evolving ménage a trios with confidence and purpose. It was oddly gratifying to not have to control things and just go along.

William reaches up to Michelle and unhitched the straps of the armbinder and then reached behind her and tugged it down. Then he gripped Janet’s arm and pulled her wrist behind her back, feeding one hand then the other into the armbinder. “No... wait... I’m not a sub... William...”

“That’s Master slut...”

Michele rolled her shoulders and then gripped Janet’s hips, riding the smaller girls phallus with more coordination.