A bisexual cuckold's femdom training takes a humiliating turn as he's forced to watch his mistress engage in passionate sex with another man. The cuckold, collared and on his knees, is ordered to service both his mistress and her lover, his own arousal growing despite his shame. The sight of his mistress's pleasure, the feeling of another man's cock in his mouth, all serve to reinforce his role as a humiliation-craving cuckold.