Beth did as he had asked and knelt on all fours on the examination couch as Ben moved behind her with another syringe, this time full of lube. He pushed the nozzle into her sphincter and released the cool tingly mint gel into her cavity in one smooth motion.

The doctor was preparing Beth to take a black nine inch probe that had three graduated and weighted egg shaped sections. This would really begin to stretch Beth open he thought as he snapped on some latex gloves and then pushed his finger into her hole, spreading the lube around.

Each egg shaped section of the probe contained a weighted, free moving ball bearing and each was wider than the previous one. All together, it was a pretty intimidating piece of kit. At the end of the probe, there was a finger loop so that once inside, it could easily be removed when needed.

Ben placed the probe about a foot away from Beth's face so she could see it in all of its terrifying glory. As he showed Beth the probe, he began explaining how each egg shaped section would move deeper within her when the next is inserted.

Insertion of the probe would be extremely intense for Beth and she would feel incredibly stretched and doubt it's ability to fit but he promised that he would not place her body under stress that she was not able to take and that there would not be harm caused. Beth stared at the probe in disbelief but obediently remained in position. She was scared and emotionally raw but she trusted him and wanted to submit.

Ben moved behind her and after angling the examination light so that it illuminated her rear in bright white clinical light, he began to slowly push the terrifying implement into her slippery hole.

The first egg slipped inside fairly easily but the second was more difficult, the width of the widest part being a whole inch and a half in diameter.

The stretch was proving a lot for Beth to handle and it hurt. She whimpered and swayed her hips gently as Ben slowly applied the necessary pressure, pausing only momentarily to adjust the overhead lamp so that maximum light bathed her anus and he could carefully observe her little band of muscle at close range as it opened wider and wider.

Finally, her tight muscular ring capitulated and the egg popped through her hole, her bottom swallowing it up greedily, pushing the first egg out of its path and sending it shooting deeper into her with an audible gasp and a moan from Beth.

Now, with two of the eggs inside her bottom, Ben began massaging her hole with very firm pressure and then thrusting his gloved fingers in and out, scissoring them open to try to get the tight band of muscle to relax some more.

In response, Beth began panting and moaning loudly, occasionally making high pitched breathy vocal noises as he finger fucked her tight hole. She opened her legs as wide as she could and dropped down onto her elbows as Ben lined up the last egg, testing the size against her.

The last of the trio was a huge two inches in diameter and Beth gasped as Ben injected another syringe of lube directly into her tender hole in preparation for it. As the blunt point of the egg began it's insurmountable invasion, Beth tried to crawl away as the seemingly never ending stretch continued to build and build.

Eventually, just when Beth was thinking she would split, the final egg shot inside and she breathed a sigh of relief. Now she could concentrate on how deeply penetrated and pleasurably full she felt.

With the hot tender throbbing from her freshly injected and swollen flesh continuing and the competing sensation of the weight of the eggs filling her, Beth felt extremely aroused. She needed release.

"Ben... Please...."

She panted breathlessly,

"Make me cum......"