Monica Mattos, a seemingly innocent wife, is initiated into the world of cuckolding and BBC worship. Her mistress, a stern dominatrix, presents her with a massive black cock, commanding Monica to service it. Monica, hesitant at first, soon finds herself lost in the sensation, her mouth and pussy stretched to their limits. The mistress humiliates Monica, calling her a cuckold's slut, while her husband watches, helpless and humiliated, as his wife is trained to crave BBC.