Susan Stewart suggested this one. Thanks Susan!
It's good when their good
it's bad when they aren't.
Not all are evil
but some play the part.
Cinderella slept in the ashes
Leaking tears on dusty lashes
but the step mother did not see
or refused to care, simply
wanting what was not hers
out of her whiskered hair.
For not all mothers are motherly
not all steps go up
but those that have to endure her
must forgive their wicked luck.