"I... I really don't think th... that I can g... go through w... with this!" the stammer in Nancy's voice was worse than ever.
Jill frowned crossly, thinking of the hours that she'd invested in that voice, not only in getting rid of the stammer but in the tedious repetitions and exercises that she had given Nancy a well modulated, high pitched feminine voice. But at least the voice was right and the stammer was no giveaway to her true sex.