Queening
From wipipedia.org

In the field of human sexual behaviour, queening is a sex act in which a woman sits over a man's face, typically to allow—or require—oral-genital or oral-anal contact. It is common for a domme to subject a submissive to this position as a form of demonstrating superiority or facilitating the humiliation of a partner. The term has, in present time, come to be known to encompass a broader spectrum of female domination. A device known as a queening stool is sometimes used to facilitate this activity.