The dominant mistress teases her lover, running her fingers along her swollen, eager pussy lips. She slips one, then two fingers inside, feeling the slut's tightness pulse around her. The slut begs for more, and the mistress obliges, adding a third finger, then a fourth, stretching her open. With a final, deep thrust, she pushes her entire fist inside, causing the slut to gasp in pleasure and pain. She fucks her mercilessly, feeling the slut's juices coat her hand as she brings her closer and closer to orgasm.