Closer and closer she came to climaxing. She had begun thrusting her pelvis upward. Her mouth was opened and she was moaning again. The Doctor maintained a steady pace with the vibrator up and down the sides of her clitoral hood and his finger massaging her anus. He could see the stomach muscles tightening and the bulging of her vulva became more obvious. He felt her anus clenching at his fingertip. She was going through pre-orgasmic contractions. The base flange of the plug was now visible moving in a rhythmic in and out manner as the contractions got stronger. Her clitoris was fully erect and projecting from its hood. The Doctor rubbed the vibrator up and down the length of her clitoral hood, stimulating that stiff little buried shaft from the root almost to its tip.

Moments later she had her answer. She felt something hard, smaller and more rounded back there. She felt it enter her. Slowly it went deeper into her rectum, even deeper than his finger had been. The doctor had inserted a douche nozzle into his patient’s luscious little anus. Watching that slick white plastic nozzle slowly disappear into her enticing little opening was hugely arousing for him and his cock was fully erect for what seemed like the hundredth time today. The nozzle was attached to a silicon rubber hose. The hose was attached to ared rubber enema bag, filled with almost two quarts of lukewarm water and held high in his other hand. Only the little flange at the base of the nozzle remained visible now. He momentarily released his grip on the nozzle and was pleased to see that it stayed in place in her rectum.

She felt a cool slippery lubricant being applied to her anus. She was highly sensitive there and it felt good. It was very stimulating, not only physically but mentally as well. The Doctor was teasing her most private spot, doing as he pleased with her. All her openings were available for his pleasure. Nothing was taboo, even back there, even IN there, she thought when she felt his well lubricated fingertip push inside. The previous times he had only inserted his fingertip, and only deep enough to barely pass through her inner sphincter muscle. This time he went further. He slowly pushed the whole length of his finger through that muscle and inside her rectum. Then he withdrew it, added more of the thick lubricant and did it again. She wondered what he would do next. Was he lubricating her anus in preparation for putting his cock inside? The thought both thrilled and scared her.

She had no idea of what was coming. Suddenly she felt something being inserted in a place that she had not been expecting. It was an entirely different sensation, not painful at all, but certainly noticeable. The tip was a constant small diameter about the size of a regular glass thermometer for a length of about an inch long. Then it gradually tapered larger to the size of the body of the thermometer. The doctor wanted a good internal temperature reading and slipped the tip fully inside her urethra. It felt strangely erotic to her as it slipped deeper into her urethra. He held it there until it beeped and he noted 99.8, which was within the normal range for a woman in a sexually aroused state. He momentarily let go of the thermometer and it stayed in place.
She had a small urethra.

She opened her legs and slightly raised her hips to meet his touch. The doctor fingers found the indentation in the crotch of her panties that marked the opening of her vagina. The fabric was very damp, nearly soaking. He rubbed his finger there and she responded by opening her legs fully and slightly gyrating her hips in time with his strokes. The doctor slipped his finger back up the slick fabric, following the crease between her labia. He found her clitoris, hard under the soft cotton. He rubbed his finger up and down the sides of it, palpitating the root and she moaned in pleasure. As doctor rhythmically stroked her clitoral shaft, he sucked even harder with his lips on her nipple and cycled the vacuum release button, thus causing the suction to milk her other nipple at the same time.She breathing became faster and her hips moved sensually against his fingers