It's in his penis.

‘It’s, um, it’s in my… penis. Specifically.’ Louise supressed an obvious giggle, and John continued before the doctor could notice. ‘I’m not sure what it could be.’

‘Well, that’s why I’m here,’ Doctor Harper said, pulling on a pair of latex gloves. She stood from behind her desk and came around, patting an examination bed on one side of the room. ‘Please, remove your pants, and take a seat up here for me.’

John obeyed her and stood, coming to the table as he unbuckled his belt and pants. Louise remained in her chair behind him, but as soon as he dropped the jeans to his ankles, her head spun around as casually as she could muster, though that wasn’t saying much.

‘Underwear too, John.’ Doctor Harper smiled, patting the table. He sighed and closed his eyes, now regretting ever even asking Louise to drive him. He was about to be naked from the waist down in front of his little sister, who was apparently enjoying herself.

Still facing the doctor, his back to Louise, he pulled his underpants down in one quick motion to join them with his pants on the floor. The doctor smiled. ‘That’s good. If you’ll take a seat, I can just perform a routine examination.’ John **** a smile back, knowing his little sister was likely copping an eyeful of his naked ass.

He carefully slid onto the exam table, the pain still ever-present, and was now finally **** to directly face his sister without his pants to hide his manhood. As he sat and looked up, he was shocked to see that Louise had made some adjustments herself; she was no longer seated, instead standing directly behind where he had been a moment ago. Barely a metre from where he now sat, and from his exposed genitals.

He could barely muster the courage to face her, but it didn’t matter. Louise eyes were glued firmly to his dick, sitting on the table between his spread thighs. ‘Okay.’ The doctor moved in front of his crotch, blocking off Louise’s view, much to his relief and her disappointment.

The rubber of Doctor Harper’s gloved fingers began gently touching his shaft, lifting it up, carefully pulling and prodding various points. ‘Does this hurt?’ she asked.

‘It’s… not too bad,’ he answered, trying to ignore Louise standing on her toes behind the doctor to get a better look. ‘Maybe a little.’

‘What exactly does this pain feel like, John?’ she asked, still softly handling his member. It would’ve have been almost pleasing, such an attractive woman touching him down there, even if she was doing her job, but Louise’s presence was far too distracting for such thoughts.

‘It’s kind of… a dull ache, I guess.’ While the doctor continued touching him, John finally managed to get Louise to look up from his genitals and to his eyes. ‘What are you doing?’ he mouthed silently.

Louise’s only reply was a sauntering, drawn out wink, before she went back to watching the doctor fondle him.

‘Can I ask the last time you had sex, or masturbated?’