Other examples you will see from malignant narcissists as an expression of this are:
-Intentionally and regularly being late, making a person wait to express their control over another person‘s life. 
-Intentionally bringing the wrong item when something requested of them.
-intentionally making mistakes when asked for help.
Little things like this reveal the pathology. And they particularly enjoy doing things like this where they can claim innocence, claim it was an accident or they “tried their best.” 
And most people might believe it because, why would anyone be so deranged? But malignant narcissist’s really are this deranged.