“Babygirl” is a new movie from A24 and a Dutch director, Halina Reijn, starring Nicole Kidman as a high-powered chief executive, Romy Mathis, who wants to be a boss in the office and a slave in the sheets. It offers a twist on the usual workplace affair because Mathis’s paramour is a younger male intern, Samuel (Harris Dickinson). He is willing to do to her what her husband, Jacob (Antonio Banderas), refuses. So far, so 2024.