Slowly but surely, Marielle Heller has become one of the more interesting filmmakers working today. She found layers of character and pain in 2018’s “Can You Ever Forgive Me,” and she turned the world of Fred Rogers into a deeply felt study of human connection in the wonderful “A Beautiful Day in the Neighborhood.” She’s taking on quite a creative challenge in “Nightbitch,” which is an adaptation of a 2021 book by Rachel Yoder detailing the experience of a woman feeling the full squeeze of motherhood, finding ways to escape the grind that delve into strange fantasies. It’s a tonal tightrope walk for Heller (who also scripts), overseeing a study of exasperation and coping that’s not easy to process. However, the realism of it all is quite thrilling to watch, as “Nightbitch” offers an unblinking view of life’s complications and cruelties, and it’s processed beautifully by star Amy Adams, who gives one of the year’s best performances in the feature. Read the rest at Blu-ray.com