Gaslighting can even beget more gaslighting: an abuser might hide an object or cancel an appointment without the victim's knowledge and then "help" the victim find the misplaced object or sort out the situation while berating them for their poor memory or inability to care for themselves.
From the National Domestic Violence Hotline: "Gaslighting typically happens very gradually in a relationship; in fact, the abusive partner’s actions may seem harmless at first. Over time, however, these abusive patterns continue and a victim can become confused, anxious, isolated, and depressed, and they can lose all sense of what is actually happening. Then they start relying on the abusive partner more and more to define reality, which creates a very difficult situation to escape."