We don't take bedtime stories away because they always end the day on a good note. I would have taken something else away to earn back (no TV tomorrow, or remove favourite doll or something for a day or two).
I don't do bedtime story anymore but would have punished. Probably more so for the lying than the scratch as agree they can happen 1) by accident and 2) as an impulse because other child did something first.
Hmm my dd is really odd if she (deliberately or accidentally) does anything to harm her younger brother. She'll deny and deny then throw a massive, totally out-of-proportion strop. I suspect that it's because she actually feels horrid knowing that she hurt her brother, and can't handle not likng what she did, if that makes any sense?
Makes absolute sense AS, but there will also be an element of your dd not wanting others to know that she is 'horrid' and possibly think less of her because of it.
Your dd is lucky to have a dm/df who is aware that what is displayed on the surface does not necessarily reflect what is happening underneath, and you should have no problem in encouraging your dd to examine her feelings and come to the conclusion that certain behaviour is not worthy of her.