Katerina1987, a seasoned domina, invites her younger brother Pyotr1986 for a private spanking session in their Moscow apartment. Katerina, dressed in leather, commands Pyotr to bare his bottom, then smacks it with a wooden paddle, leaving red welts. Pyotr moans, enjoying the pain, as Katerina switches to a flogger, teasing his hardening cock. She orders him to fuck her from behind, his sore ass rubbing against her leather-clad thighs.