HD, If there is some progress being made with the C, Mrs.HD is most likely uncomfortable to some degree. Your lie, while a little white one in your mind, may be a justification for Mrs.HD to halt progress which is making her uncomfortable. "I forgot" sounds irresponsible and I understand why you didn't want to say it to her. If you see this as a learning experience, ie this feels so bad that I never want to put myself or Mrs.HD in this position again, than you may have something there. Is something about Mrs.HD that makes you afraid to own up?
I don't mind the sun sometime
The images it shows
I can taste you on my lips
And smell you in my clothes
Cinnamon and Sugar
And softly spoken lies
You never know just how you look
Through someone elses eyes
BHS-"Pepper"