Yes, evil is the absence of good which is the same thing as saying that evil is the absence of being or lacks being, i.e., evil is a kind of non-being for good is convertible with being. Accordingly, evil can only exist in good or being because evil in itself is not a nature or a being. Evil considered in itself as evil doesn’t exist. Good is the cause of evil because evil as a non-being cannot cause anything. Consequently, in your example “I’m going to rape this woman and absolutely humiliate her simply because I hate everybody and want to be evil” we have both being, good, and evil. We have being and good in the person doing the raping, i.e, the person exists and is a being and so does his action of raping which action as an action is a being and exists. And whatever exists or is, is good insofar as it is, i.e., a being of some kind. But, the action here of raping is evil so its lacks being and goodness which is the definition of sin. A good action produces being and an evil action is the production of being but it lacks being and goodness, i.e., it lacks the goodness and being that ought to be there in a human action.