That's a little too far.

'I... I don't think that's...' John began, shocked that the doctor had even suggested it. Getting an erection in front of Louise, by her own hand, even, had been one thing. But orgasm? There was a line no brother should cross. 'I think that'd be a little inappropriate.'

'Doctor, my boyfriend is just being his stupid, nervous self.' Louise, her hand still on his hard dick, squeezed his shaft, causing him to inhale sharply. 'May we have just a minute?' she asked.

'Of course. Take your time. And, remember,' she said, looking at John, 'I just want everyone to be comfortable.

He swallowed as the doctor turned away and Louise glared at him, her hand still glued to his member. She leaned closer to him, until her breath was hot on his cheek, and whispered into his ear. 'Don't you remember what I said? If you don't go along with this, I'm going to tell the good doctor here the truth. Do you want that?'

He shook his head. 'No, Louise, but... this is crazy. You're already, I mean,' he looked down at his lap, where his penis was pointing directly at them under her grip. 'Isn't this far enough?'

She followed his eyes and giggled at the sight, and his discomfort. 'I know it's crazy, John. But I don't care. I say we keep going, under the doctor's instruction, of course, which means we keep going.' With the final words, she moved her hand along his shaft, squeezing hard enough to send a shiver of pleasure through his groin. 'Don't you want to feel better?'

Louise kissed her brother's cheek and stepped back, continuing to hold him. 'You're... we can't, Louise,' he whispered, shocked that she'd planted her lips anywhere near him.

'We can, big brother, and we will.' She sultrily winked, turning to the doctor before he could protest. 'Doctor Harper? We're ready.'

The doctor smiled and nodded at Louise, turning once again to her patient. 'John?'

Louise glared at her brother to agree.