If this premise sounds ludicrous, well, it is (though in no way should you take the trailer as any reflection of the film's true nature). It takes a writer-director of Heller's insightfulness and an actress as skilled as Adams to make it the wildly entertaining and profoundly honest film that it is. There is mild body horror as Mother discovers that she's sprouting a tale or developing six extra nipples. But Adams plays those moments with such disbelieving delight that she makes them more humorous than horrific. Nightbitch has a highly specific tone, one part strident feminist manifesto, one part tongue-in-cheek monster movie, and one part domestic dramedy.