Wicked Stepmother

The original plot cast Davis as the title character, a chain-smoking witch named Miranda, who has married Sam while his vegetarian daughter Jenny and son-in-law Steve are on vacation. They return to find their new stepmother has filled their refrigerator with meat and played havoc with their collection of herbs. To explain Davis' absence, the script was rewritten to introduce Miranda's daughter Priscilla, a witch who inhabited Miranda's cat. They both share one existence in human form and while one is human the other must live in the form of a cat the rest of the time. Priscilla takes on a human form while Miranda's spirit inhabits the body of the cat. Priscilla then sets out to defeat Jenny who has figured out that there is something going on. Priscilla uses witchcraft and deception to convince everyone Jenny is wrong. The entire time she refuses to switch bodies with Miranda. Jenny then figures out that they're witches and tries to stop them from ruining her family.